Various

- Added pragmas for unused method parameters.
- Changed NSDictionary to accept and return NativeSubclass.DictionaryCaseSensitive instead of the native Dictionary.
- In NSDictionary/CFDictionary, swapped VariantValue and Operator_Convert code to avoid unnecessary conversion to Variant.
- Added #if TargetMacOS to CFDictionary.Operator_Convert.
- Added optimization to NSDictionary.Operator_Convert.
- Verified ability to compile for Windows, Cocoa, and Carbon in Real Studio 2012.
- Version 157.