Fix optimization that was invalidating all C* commands
Add r_num_units and hash list is no longer hardcoded

Added ?o (octal) and ?u (units) new commands
Minor random code cleanups
Fix build
Initial 8051 disasm and ihex:// io plugin
Break ABI. r_asm_disassemble's length is now 'int'
Enhace 8085 disasm and add basic code analysis support