trying app veyor

- adjust build for windows
- adjust standalone task for windows
try to adjust relative exec call for windows
windows: try to fix "'.' is not recognized" issue

http://stackoverflow.com/questions/20765337/how-to-fix-is-not-an-interna
l-or-external-command-error
windows fix jscs issue
windows: retry with normal path
simpler appveyor.yml
windows exit/stderr flush fix

https://github.com/joyent/node/commit/20176a98416353d4596900793f739d5ebf
4f0ee1
windows fix to run cli tests
Upgrade postcss-import to 4.0.0 for Windows compatibility
Adjust mit license