Refactor DDG a little bit. In addition to dependencies between instructions, now we also have dependencies between program variables.
Refactor DDG a little bit. In addition to dependencies between instructions, now we also have dependencies between program variables.

chubbymaggie/angr,angr/angr,tyb0807/angr,schieb/angr,angr/angr,iamahuman/angr,schieb/angr,axt/angr,tyb0807/angr,chubbymaggie/angr,chubbymaggie/angr,axt/angr,axt/angr,f-prettyland/angr,iamahuman/angr,f-prettyland/angr,angr/angr,iamahuman/angr,f-prettyland/angr,schieb/angr,tyb0807/angr