Fixed msbuild compilation by removing the 3.5 bootstrap ItemGroups. (VS2010 added those on its own - hey, we are targeting v2.0 and we are not using ClickOnce!)
* Source/Build.Tasks/Build.Tasks.csproj:
* Source/Examples/OpenTK.Examples.csproj:
* Source/GLControl/OpenTK.GLControl.csproj:
* Source/Compatibility/OpenTK.Compatibility.csproj: Ensure we are
using the 2.0 toolset to build. Fixes compilation errors on
MonoDevelop/xbuild.
* Documentation/Build.Docs.csproj: Use "." instead of
"$(MSBuildProjectDirectory)", because MonoDevelop/xbuild fails to
replace the latter with its value.
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).