Fix autocompletion issue.

The issue will prompt wrong autocompletion prompt.
Fix prompt only the minimum common string from available
autocompletion strings.
Fix shlr/sdb build for sys/android
mrproper on sys/mingw
Fix Vc conflict with colors
Simplify shlr build and some w32 fixes
Fixes for r_db linkage
Damn comments
Fix clean of shlr/sdb
Fix #180 -- Add system-wide radare2rc
Fix mingw32 build
Fix issue 195.
ARC analysis fixes
UTF8 arrows initial support