Added System.Boolean class
Fixed some minor inconsistency in NumberFormatter class.  A .Net (long) is (int64) in this library. This makes a big difference when porting code.
Forgot to add CRAPOCOREDLL_API to Boolean class.  Also was not in System folder in Visual Studio project.
Added support UInt64 built in type.
Added Base64Constants class and Base64Helper class.
Added UnitTestConvert.
Added _base variable to Array class.
Added Base64Helper to project
Redid Convert ToBase64CharArray and FromBase64CharArray functions
Added Boolean and UInt64 classes
Renamed test method from GetTempPath to GetTempPath1