Add SourceMod 1.5.3 include files.
Add Object Library from SourceMod Project Base Components (253:33c7e0d3606b).
Add Zombie API include files from 2014-05-06.

API file revision: 1f3146c53454cf6329e02d467f36a4f33ba54e35
Fix include paths in object library files.
Add missing array library.
Add initial implementation of module manager.