Merge pull request #21 from atdog/master

handle more calculate opcode(mul, add, div, rem, sub ...)
add opcode "sub-int", "or-int/2addr", "or-int/lit8", "packed-switch"
Merge branch 'master' of https://github.com/dm4/contentprovider-androguard
add opcode "rem-int/2addr", "mul-double/2addr"