implement PATHEXT extesion file support#8

Merged

harryfei merged 2 commits intoharryfei:masterfrom WLBF:master

Mar 19, 2018

+220-91

Commits on Mar 11, 2018

implement find path with windows executeable extensions
WLBF
committed

Commits on Mar 19, 2018

implement windows extension test
WLBF
committed