-Split VariationList into .h/cpp files.
--Make VariationList.cpp the only place where the variations files are included from. This speeds up the build, but variations can no longer be directly instantiated.
--Variations are no longer exported.
-Add toolbar buttons to switch some rendering options without having to open the options dialog.
--Bug fixes
-Only update summary on render completion, no need to constantly update it.
-Properly handle cancel even on variations dialog.
--Code changes
-Add small function ShutdownAndRecreateFromOptions() to wrap shutting down the timer and recreating the renderer.
-Use the overridden accept() and reject() functions more consistently across dialogs.
-Add variations filter/selection dialog.
--Bug fixes
-Fix summary window not properly indicating the presence of pose affine.
-Remove a file named Fractorium.aps which had been erroneously committed a year ago.
--Code changes
-Use qobject_cast instead of dynamic_cast where appropriate.
-Add more override keyword where appropriate.
-Add variations list to settings for filter dialog.
