core: redesign expression, add expression matcher, make a specific expression for assignment (BROKEN)
core: fix part of compilation issue
core: it compiles again, continue to improve expression features, start to design expression simplifier
core: get rid of wchar_t related function, improve expression feature, continue to implement expression simplifier
core: disassembler is less verbose, fix null ptr deref
Merge pull request #6 from wisk/dev

Dev