redline6561/coleslaw — pull request #26 by woudshoo (2013-04-12 13:48:13+00:00)
Title: Raise condition if the theme package cannot be found.

If you specify a theme that not exist, you get an error which is not very clear.
With this change a specify theme-does-not-exist condition is raised and
the name of the missing theme is shown.

In the old code you get an error that the symbol 'base does not exist.