Generate entry point tables
Add slots into entry point table
Removed delegates and DllImports
Allow overriding of loading methods
Clarified GetAddress documentation
Implemented new loading mechanism
Hooked up new loading mechanism
Hooked up new loading mechanism
Regenerated bindings with new loading mechanism
Removed GLObsolete.cs helper

This file must be recreated using the new loading mechanism.
Moved address parameter to last place

This way, it is the last item on the evaluation stack before calling the
unmanaged function pointer. This simplifies the calli rewrite procedure.
Regenerated bindings
Implemented dll rewriter using Mono.Cecil
Added InteropHelper file
Added OpenTK.Rewrite project