WIP: Simplify pgo theme and CSS

Test with $ python venus/planet.py config/gnome/config.ini --no-publish -v -o

Note that config.ini has modified output paths for the sake of easier testing. This is just for the WIP branch.

To do for merging:

• Update copy-pasted common WordPress styles in the CSS file, perhaps as a complimentary CSS file and not the main one
• Reduce padding in the Donate Now area
• Remove other left-over CSS from older iterations of the theme
• Rename the theme into its own directory/namespace to not loose the previous version
• Copy-paste only what is needed of wgo theme (To not depend on an unpredictable external CSS)
• Try and remove the jquery dependency with vanilla JS (feed selector)