--from Latte v0.9.3 indicators can be loaded also as
a general background layer for the view. Do not load
the background layer in that case, we only need to
load the foreground one when the android-style click
animation is needed
--introduce a new class called level which contains
all the needed information concerning indicator level
and at the same time the bridge that provides information
for the specific indicator states
Michail Vourlakos