plenty of changes: * biggest change is rewrite of pdf/Document - it now is a singleton class which handles its loaded document by itself - caching is done in a seperate thread. - Poppler has been made "thread-safe". At least it works with threads now. ;) - document understands Viewport Layout.
* nPresenter - added help screen on start up - you can cycle through Viewport Layouts which Document now provides - interaction with new Document-Class is checked in. Could still be cleaned up a bit.
* pdf/Page - removed - all done in Document now
* nPresenter.doxygen - added configuration for doxygen. - We now can generate docs. Hurray! :)