Added background color to folders, gui-fade in/out and spinner routines
Added background clour to battery display quantity.
These sections of the code had not been updates to Clutter 1.12.2 in
the original Clutter code update.
Updated README, Changloggtk3, and sbmanager-error files with lastest info.

Signed-off-by: Timothy Ward <gtwa001@gmail.com>