[bashrc] Better base PS1

Better colors, SSH context
[bin/ffbrun] Set default ASAN_OPTIONS
[bin/ffbrun] Cleanup debugger code
[bin/sh_color_ref] Rewrite, add 256color list

Still needs work, 256*256*7 is a bit large
[emacs] Comment out unused global mode

Set in neph-coding
[emacs] Turn off ac-auto-help

I keep turning this on and then realizing it's annoying. The cycle
continues.