- Renamed the MinGW compiler from 'gcc'->'mingw'. It also uses a new class, WindowsMinGWCompiler. - Added another registry key to search when finding an installed MinGW compiler.
- Renamed the MinGW compiler from 'gcc'->'mingw'. It also uses a new class, WindowsMinGWCompiler.
- Added another registry key to search when finding an installed MinGW compiler.

lewissbaker/cake,lewissbaker/cake,lewissbaker/cake,lewissbaker/cake