Revert "Replace old style with a new one. Actionbar is now white."

This reverts commit fa95d14abafdce6b576ef446d2c2f27b21b1e21e.
Removed lots of useless drawables
Style cleaned a little bit
Images are centered and cropped
Added new frame to article view and improved a little bit the custom theme
Added "social" cababilities, "view original page" and improved theme