Fix matcher to catch gcc output on OSX 10.9
Tweaks to the generated visual studio project file
Further work on VisualStudio solution file generation

- Added VisualStudioProjectRegistry to assist building VisualStudioProject from native binary
- Extracted logic for constructing a visual studio solution for a native binary, using the project registry
- VisualStudioSolution and VisualStudioProject are not BuildableModelElements
Add project references between visual studio projects based on native binary dependencies
Updates to c++ spec