Cleanup Bad Icons

* Remove unused Icons from repository
* Fix rendering on other pngs (namely 16x16 ones)
* (FIXME) Right now we are storing some status icons in 48x48 which
  should really be relocated somewhere else since they are acutally
  15x48 in size
* Should address issues in #126
Merge pull request #127 from Teknocrat/bad-icons

Cleanup Bad Icons
GTK 3.12 Compliant icon names

rename all icons to match new gtk icon naming convention