Remove QQuickItem/PaintedItem wrappers

They were used to hide the differences between QQuick* items and
QDeclarative items when we supported Qt4 and 5.

Now that we've dropped Qt4 support, we don't need theese wrappers
anymore.
added  qdoc
added qdoc
some docstrings
more docstrings
some docstrings
more docstrings
merged rename
more renaming in docstrings
added  qdoc
some docstrings
more docstrings
some docstrings
cleaned up
Merge branch 'qdoc' of github.com:Bacon2D/Bacon2D into qdoc
fixed cruft from bad merge