Add a new property 'category' to SimMemory class.
Add a new property 'category' to SimMemory class.

The old custom of testing if SimMemory.id == 'mem'/'reg' is both dumb and not kept consistant across SimuVEX code.

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