Files :
1. Added admin/remove-games.php
2. Added admin/category-sync-fgd.php
3. Added admin/pending-games.php
4. Changed mochi class to category class
5. Added a clear category cache function

Database :
1. Merged the mochi tables into the arcade tables
2. Optimized score and category tables

Features :
1. Added FGD game support

Other :
1. Added curl support for file imports
2. Optimized the category sync queries