Add PHP Image. Source: http://bit.ly/15CQzbI
Add Ruby Photo. Source: http://bit.ly/Zy0wmS
Add simple readme with example and installation instructions.
Add support to overwrite default colors.
Update the lightness/darkness script to be more accurate.

Now, were getting the "lightness" of each of the colors and determing if the overall image "lightness" is over a specific threshold or not.
Update `.gitignore` file to ignore comopser lock file.
Update CS fixes.