* src/client/application/geary-application.vala
  (GearyApplication::read_theme_file): Renamed to ::read_resource, do the
  lookup on a GResource instead of from the file system.
  (GearyApplication::get_ui_file): Remove unused method.

* src/client/conversation-viewer/conversation-web-view.vala
  (ConversationWebView): Chase CSS file rename and load method.

* theming/CMakeLists.txt: Removed, no longer needed.

* theming/message-viewer.css: Moved to ui/conversation-web-view.css.

* ui/CMakeLists.txt: Add conversation-web-view.css resource.

* CMakeLists.txt: Remove theming include.

* src/client/application/geary-application.vala :