Enabled enum overrides in the CL and ES generators.
Function parameters now follow enum overrides (for example, if function Foo takes enum Bar and enum Bar is overriden to Baz, this change will be reflected on function Foo).
Changed default CLGenerator settings to not generate debug helpers.
Replaced all instances of Version14, Version15, Version20, Version30 and Version31 enums by type-safe equivalents.
Added gloverrides.xml to support overrides to function parameters / return types. This will make future spec updates easier to merge.
Improved handling of invalid tokens in the specs.
Bindings are now written in alphabetical order. This will reduce patch size for future updates and make side-by-side comparisons easier to perform.
The doc processor can now document more OpenGL functions (e.g. GL.Color3).
Cleaned up several pieces of code in Bind (but I'm afraid it's hopeless - spaghetti code at its greatest).
Minor cleanup. Added code to turn ALL_CAPS enums into .Net CamelCase enums - must take care of the extensions before enabling this.
Added a couple new commandline options, and fixed a misspelling (NestedEnumsClass was NestedEunmsClass, ugh!)
