Microsoft Specific asm support
- precondition: keyword __asm must be replaced by preprocessor with asm
- grammar 1: asm assembly-instruction ;
  - not supported: asm assembly-instruction // without ;
- grammar 2: asm { assembly-instruction-list } [ ; ]
- add unit tests for inline assembler
Merge pull request #333 from guwirth/enhancement/MSVC_asm_support

Microsoft specific asm support