always use slash as path separator in GSJS proproc script
always use slash as path separator in GSJS proproc script

Fixes trello#23.

Whizy/eleven-server,KaiyonAlatar/eleven-server,ElevenGiants/eleven-server,ElevenGiants/eleven-server,Whizy/eleven-server,KaiyonAlatar/eleven-server,Mexiswow/eleven-server,KaiyonAlatar/eleven-server,ElevenGiants/eleven-server,Whizy/eleven-server,Mexiswow/eleven-server,yelworc/eleven-server,yelworc/eleven-server,reversefold/eleven-server,reversefold/eleven-server