GPII-271 & GPII-266: Visual Alternatives, Language & Volume adjuster groups and saving to the Preferences server.

Here are the links to the JIRAs:
http://issues.gpii.net/browse/GPII-271
http://issues.gpii.net/browse/GPII-266

PrefsEditors / demos / {pcp, pmt} / index.html are the demos for the new adjusters.

PrefsEditors / src / {pcp, pmt} contains the individual part for each panel (PCP & PMT), the common part is in the shared/ directory.