Show current mode in vim
Set colors for git branches
Set some bash options
* Ignore case
* Don't autocomplete hidden files unless pattern begins with a dot
* Prefer US English and use UTF-8
* Ignore some commands in history
* Append history instead of overwriting
* Ignore duplicates in history
* Add file size function
Add bash completion (+ git) and make shell prompt show current branch
Ignore files created by rails generator completion