build.py: add support for nmake 32 bit toolchain
Add MSVC architectures
Add compiler: msvc-2013.cmake
Visual Studio toolchains: add HUNTER_MSVC_* variables
Add nmake x86 toolchain
Add macro polly_init
Print tag
Remove explicit set of tag
Use polly_init
No generator for default toolchain
Use polly_init to define TAG, NAME and generator
Rename
Fix guards
build.py: update toolchain names
Merge branch 'master' of https://github.com/ruslo/polly