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                    GNU LESSER GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this license
document, but changing it is not allowed.

This version of the GNU Lesser General Public License incorporates the terms and
conditions of version 3 of the GNU General Public License, supplemented by the
additional permissions listed below.

0. Additional Definitions.
   As used herein, “this License” refers to version 3 of the GNU Lesser General
   Public License, and the “GNU GPL” refers to version 3 of the GNU General Public
   License.

“The Library” refers to a covered work governed by this License, other than an
Application or a Combined Work as defined below.

An “Application” is any work that makes use of an interface provided by the
Library, but which is not otherwise based on the Library. Defining a subclass of
a class defined by the Library is deemed a mode of using an interface provided
by the Library.

A “Combined Work” is a work produced by combining or linking an Application with
the Library. The particular version of the Library with which the Combined Work
was made is also called the “Linked Version”.

The “Minimal Corresponding Source” for a Combined Work means the Corresponding
Source for the Combined Work, excluding any source code for portions of the
Combined Work that, considered in isolation, are based on the Application, and
not on the Linked Version.

The “Corresponding Application Code” for a Combined Work means the object code
and/or source code for the Application, including any data and utility programs
needed for reproducing the Combined Work from the Application, but excluding the
System Libraries of the Combined Work.

1. Exception to Section 3 of the GNU GPL.
   You may convey a covered work under sections 3 and 4 of this License without
   being bound by section 3 of the GNU GPL.

2. Conveying Modified Versions.
   If you modify a copy of the Library, and, in your modifications, a facility
   refers to a function or data to be supplied by an Application that uses the
   facility (other than as an argument passed when the facility is invoked), then
   you may convey a copy of the modified version:

   a) under this License, provided that you make a good faith effort to ensure that,
      in the event an Application does not supply the function or data, the facility
      still operates, and performs whatever part of its purpose remains meaningful, or 
   b) under the GNU GPL, with none of the additional permissions of this License
      applicable to that copy.
      
3. Object Code Incorporating Material from Library Header Files.
   The object code form of an Application may incorporate material from a header
   file that is part of the Library. You may convey such object code under terms of
   your choice, provided that, if the incorporated material is not limited to
   numerical parameters, data structure layouts and accessors, or small macros,
   inline functions and templates (ten or fewer lines in length), you do both of
   the following:

   a) Give prominent notice with each copy of the object code that the Library is
      used in it and that the Library and its use are covered by this License. 
   b) Accompany the object code with a copy of the GNU GPL and this license document.
   
4. Combined Works.
   You may convey a Combined Work under terms of your choice that, taken together,
   effectively do not restrict modification of the portions of the Library contained
   in the Combined Work and reverse engineering for debugging such modifications, if
   you also do each of the following:

   a) Give prominent notice with each copy of the Combined Work that the Library is
      used in it and that the Library and its use are covered by this License. 
   b) Accompany the Combined Work with a copy of the GNU GPL and this license
      document. 
   c) For a Combined Work that displays copyright notices during execution, include
      the copyright notice for the Library among these notices, as well as a reference
      directing the user to the copies of the GNU GPL and this license document. 
   d) Do one of the following: 
      0) Convey the Minimal Corresponding Source under the terms of this License, and
         the Corresponding Application Code in a form suitable for, and under terms that
         permit, the user to recombine or relink the Application with a modified version
         of the Linked Version to produce a modified Combined Work, in the manner
         specified by section 6 of the GNU GPL for conveying Corresponding Source. 
      1) Use a suitable shared library mechanism for linking with the Library. A
         suitable mechanism is one that (a) uses at run time a copy of the Library already
         present on the user's computer system, and (b) will operate properly with a
         modified version of the Library that is interface-compatible with the Linked
         Version. 
   e) Provide Installation Information, but only if you would otherwise be required
      to provide such information under section 6 of the GNU GPL, and only to the
      extent that such information is necessary to install and execute a modified
      version of the Combined Work produced by recombining or relinking the Application
      with a modified version of the Linked Version. (If you use option 4d0, the
      Installation Information must accompany the Minimal Corresponding Source and
      Corresponding Application Code. If you use option 4d1, you must provide the
      Installation Information in the manner specified by section 6 of the GNU GPL for
      conveying Corresponding Source.) 

5. Combined Libraries.
   You may place library facilities that are a work based on the Library side by
   side in a single library together with other library facilities that are not
   Applications and are not covered by this License, and convey such a combined
   library under terms of your choice, if you do both of the following:

   a) Accompany the combined library with a copy of the same work based on the
      Library, uncombined with any other library facilities, conveyed under the terms
      of this License. 
   b) Give prominent notice with the combined library that part of it is a work
      based on the Library, and explaining where to find the accompanying uncombined
      form of the same work. 

6. Revised Versions of the GNU Lesser General Public License.
   The Free Software Foundation may publish revised and/or new versions of the GNU
   Lesser General Public License from time to time. Such new versions will be
   similar in spirit to the present version, but may differ in detail to address new
   problems or concerns.

Each version is given a distinguishing version number. If the Library as you
received it specifies that a certain numbered version of the GNU Lesser General
Public License “or any later version” applies to it, you have the option of
following the terms and conditions either of that published version or of any
later version published by the Free Software Foundation. If the Library as you
received it does not specify a version number of the GNU Lesser General Public
License, you may choose any version of the GNU Lesser General Public License ever
published by the Free Software Foundation.

If the Library as you received it specifies that a proxy can decide whether
future versions of the GNU Lesser General Public License shall apply, that
proxy's public statement of acceptance of any version is permanent authorization
for you to choose that version for the Library.
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