Git: remove unused
Git: x alias

- runs a command on modified files
- ie: git x rspec
Bash: fix prompt length calcucation

- sometimes long prompt would cause bash to put cursor in a middle of a
string instead beginning. Apparently that's because of the way readline
calulates input length having escape chars: http://superuser.com/questions/367275/linux-coloring-bash-prompt-will-broke-carriage-return
- enclose escape sequences with \[ \] to fix above issue
- remove {} around variables, $is sufficient: less chars after all
Bash: improved watchme script

now it's parametrized

- run `rspec` with files that changed: `./watchme 'rspec %' ./spec`