More RPN ESIL (udis86, vm, conditionals, ..). Honor cfg.debug

- A debugger session can be turned into emulation with 'e cfg.debug=0'
- Fixed undo seek issues
- Fix "Unknown register 'rip'" issue
- debugger commands mixed with analysis ones. We must merge at some point
- More udis86 instructions translated to the new esil
Fix coverity issues
Bump capstone (with merged optimized branch), must re-test tab regression
Workaround to ensure mips / branch delayed code properly accounts function size.
Fix 'afc' (code complexity), fix nulltype xrefs and some helps
Fix #1037 - Fix segfault in iij, irj, ..
Bump capstone from git
More work on arm-thumb-capstone + esil
Fix segfault in esil for arm-thumb and colorize 'ar?'
Fix latest coverity issues 1223224 1223225 1223226 1223227 1223228
Add MIPS opcodes description
Colorize analysis help
Added references to API documentation to DEVELOPERS
Revert b61a377
Bump another capstone from git
Even more colored help!
Shrink r_core_help() and fix dr? output
Initial MIPS RPN-ESIL backend and handle loops and conditionals
Initial support for conditional, comments, and cpu flags in RPNESIL
Colorize p? and w?