Optimize radiff2 -g off1,off2

- Less than one sec now versus more than 15 before
- Code is cleaner (no more "r_core_cmdf")
- Colours are now correct
- Fix `radiff2 -C`
Fix crash on OSX debugger
Handle \~ in r_core_cmd and extend 'cd' command to handle home expansion
Minor cleaning of radiff2
Coverifix for rpnesil
Close #1217 (Determine UTF8 locale automatically)
Handle 'pij' as an alias for 'pdj'
Fix $S and $SS
Fix pdj
Fix pdj/pDj
Fix rasm2 -a arm -b 16
Fixes in pdn. and pass negative blocksizes as bwdisasm mode
Workaround to fix some broken 'izj'
Use memmove instead of memcpy to avoid overlap issues in RBuffer
Fix r_socket_http_answer()
Fix output of 'iaj'. Should make #1228 happy
Fix #1160 - Add help message for ':'
added type enumeration with lib magic in bin_any.c plugin
changed default arch from 'x86' to ''
Fix build