Revert new color framework
Revert new color framework

This still has some issues with it that need to be worked out.  See
ticket #103 for the current state.

This reverts commits:
* 1da06a4b63941dc5e00a9ab31399276fec832dfa
* 879d54031dc8369398a486f7ca54dea91cabdd6c

prajnak/bash_it