ENH: Update CTK: Add python, library factory and ctkVTKRenderView improvements

$ git shortlog --no-merges e15af4d..4e85deb
Andras Lasso (3):
ENH: Make executeString and executeFile invokable from Python
ENH: Added test for ctkAbstractPythonManager::executeString wrapping
ENH: Allow automatic view rotation by less than 1 degree

Caspar Goch (1):
XnatTreeModel: Make sure last is at least first when inserting rows

Isaiah Norton (1):
LibraryFactory: allow setting LoadHints for sym resolution

From: Andras Lasso <lasso@queensu.ca>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@25410 3bd1e089-480b-0410-8dfb-8563597acbee