Many bug fixes in scout.py.
Many bug fixes in scout.py.

angr/angr,zhuyue1314/angr,schieb/angr,iamahuman/angr,chubbymaggie/angr,GuardianRG/angr,xurantju/angr,tyb0807/angr,axt/angr,axt/angr,lowks/angr,avain/angr,fjferrer/angr,avain/angr,lowks/angr,f-prettyland/angr,haylesr/angr,mingderwang/angr,xurantju/angr,schieb/angr,schieb/angr,terry2012/angr,axt/angr,cureHsu/angr,tyb0807/angr,angr/angr,iamahuman/angr,terry2012/angr,zhuyue1314/angr,f-prettyland/angr,chubbymaggie/angr,angr/angr,haylesr/angr,cureHsu/angr,chubbymaggie/angr,fjferrer/angr,GuardianRG/angr,iamahuman/angr,f-prettyland/angr,tyb0807/angr,mingderwang/angr