Add missing Rect2 methods to GDNative API
Add missing Quat methods to GDNative API
Add missing NodePath methods to GDNative API
Add missing String methods to GDNative API
Add missing Array methods to GDNative API
Add missing Basis methods to GDNative API
Add missing Color methods to GDNative API
Update gdnative_api.json
Using `misc/scripts/fix_headers.py` on all Godot files.
Some missing header guards were added, and the header inclusion order
was fixed in the Bullet module.