Import .bashrc
Abstract reference to $yellow to $color
Make Bash prompt green
Remove background process count from end of prompt

Although I like to see if there are backgrounded processes, I would
prefer to only show the number of background processes when there are
some. Until I implement that, I'm removing it entirely. It's kind of
annoying to always see [0] at the end of the prompt.
Update comment.

This condition doesn't contain any of the "handy aliases" mentioned
since they were removed before this file was even put under version
control.