Updated readme to include info about the phablet-trusty branch.

Change-Id: I80b9188ff0c97e8e51b782faaf5d3663d38d6d6a
Signed-off-by: David Rodero <david@codiguiel.net>
lpm: power optimization
charger: skip initial display blank
overlay: bring back electron beam screen off
Merge branch 'cm-11.0' of git://github.com/dhiru1602/android_device_samsung_galaxysl into cm-11.0
Merge branch 'cm-11.0' into phablet-trusty