Update wizard.c

 * Added light and dark solarized themes from
   https://github.com/solarized. Text and
   background colors must still be set manually
   to the values #657B83 and #FDF6E3.
Update tilda.glade

 * Adding Solarized Light, Solarized Dark, and Zenburn
   to built-in foreground/background color schemes.
Update wizard.c

 * Adding Solarized Light, Solarized Dark, and Zenburn
   to built-in foreground/background color schemes.
 * Fixes #19 (pull request from brianmarx)