Added classic/color theme with -c switch

I made a classic theme (in color) that is invoked when archey is called with the -c flag.

This is what it looks like with my colorscheme:
![archy-osx with the classic theme](http://f.cl.ly/items/2J3b2E1v2g0n2E2t1v3P/Image%202013.05.23%2010%3A49%3A47%20PM.png)