* Added '--oneof-union' option.

Used with the .proto -> .fbs converter, will translate protobuff oneofs to flatbuffer unions.
Updated proto test to check both methods of converting oneofs.

* Added '--oneof-union' option.

Used with the .proto -> .fbs converter, will translate protobuff oneofs to flatbuffer unions.
Updated proto test to check both methods of converting oneofs.

* FlatBuffers: Moved MakeCamel() into idl_parser.cpp

Removes library dependency on Java/C# generator code.