Implement 'cat', 'cd' and 'ls' commands. Better version info in ?V
Fix #221 - do not show output if file redirect fails and add 'rm' command
Fix #187 - git is not mandatory to build r2
Completely remove DEVEL_MODE from r2-bindings
Fix 'wo' command
Enhace Vt
vmenus cleanup and add f= command for flag percents
More work on ctypes+rcore
Fix #220 - `agfl` graphs the whole file instead of the supplied function