Code review comment for lp:~trb143/openlp/ThemeManager2

Here is a big one.

The code is not complete and needs a lot of polishing but we have some significant functions working.
To summerize the state of play:
Themes Import , Add , Edit (80%) and delete work. (Don't delete last theme!)
Themes pushed to all components.

Service Controller has Theme drop down which pushes themes to the rendermanager.
RenderManager created to help plugins undertake rendering (30% complete)
Bibles and Custom plugins generate a rendered slide (Only one for now)
Rendered slide displayed On preview page and uses Theme set in slide controller.

Move 2 classes to correct place.