Fix invalid flag name filtering issue and add rax2 -t (timestamp)
Detect more c++ bins, demangle symbols and fixes in udis86

Better detection of c++ bins
Handle symbol/import name mangling as code comments
Fix visual menu 'VT'
Fix udis86 call analysis
Initial working code injection with r_debug_execute()
Rename and fix scr.{stride,cols} as hex.{stride,cols}