Add support for external MSVS 2017 projects too
Add support for external MSVS 2017 projects too

Recognize external MSVS projects using 15.0 version as being MSVS 2017
ones, just as we already do with 14.0 and MSVS 2015 etc.

vslavik/bakefile,vslavik/bakefile,vslavik/bakefile