cleanup

- Added Axis_drift_tolerance to piplay menu controls. Should help with
movement 'jitter' in menus.
- Moved ks.yaml to 'assets' folder
- Removed Theme - documented.yaml, it was duplicate of /themes/
optimization update

Changes made to menu controls and display.update
scenes must append a rect to self.update_display in order for areas to
be updated.
bug fixes & --quicklaunch arg

Fixed bugs with new integrated menu controls.
Added --quicklaunch argument that can be passed at runtime to kick user
straight into rom list.
update default theme

added new icons: raspi-config, xbox-toggle
bug fix - pmcontrollerconfig.py
quicklaunch bug fix

quicklaunch bug: reset quicklaunch arguments after use in order to keep
everything working correctly.
merging
Merge branch 'mholgatem-master'