* Source/OpenTK/Compute/CL10/Core.cs:
* Source/Bind/Specifications/csharp.tm:
* Source/OpenTK/Compute/CL10/Delegates.cs: cl_context_properties
should be mapped to IntPtr, not int.
Modified CreateContext signature to return ErrorCode rather than plain
int.
* Source/OpenTK/Compute/CL10/CLHelper.cs: Added helper overloads that
convert ContextProperties enums into IntPtr internally.