added cleaner handling of missing dirs
Use color constants for all green,red
Create color constant for white
Name the colors so they're easily themeable
Extracted constants for path colors
Fixed missed instances of clean repo fg
special color for svn
virtual env colors
Added more comments about the types of colors
Provided a link to an image about 256-colors
Use a separate constant for svn bg
Use the same bg for path and cwd
Begin allowing command line arguments

Rather than needing to edit the script directly, allow the user to
provide some args to the script. To start this, allow passing the
--cwd-only argument, which will limit the path output to just the
current working directory.
Merge pull request #33 from b-ryan/cli_arguments

Begin allowing command line arguments
Merging color change
Merge branch 'master' of https://github.com/egeland/powerline-bash
Cleaning up the new function
Forgot to rename variable. Fixed
A little refactoring and fixed get_valid_cwd function
Fixing some linter errors