Added allowed escaped strings to shlex.py
Added allowed escaped strings to shlex.py

buildbot/supybot,ProgVal/Limnoria-test,raboof/supybot,kblin/supybot-gsoc,prashantpawar/supybot-rothbot,Ban3/Limnoria,haxwithaxe/supybot,frumiousbandersnatch/supybot-code,jeffmahoney/supybot,mazaclub/mazabot-core,mazaclub/mazabot-core,Ban3/Limnoria,ProgVal/Limnoria-test