remove theme engine and filemanager

filemanager will be added to a later point
theme enging is dropped and will be replaced later
with a better system

disable not implemented overlays
disable dashclock compile for now till trds is back with new implementation
disable latinIME lib for guesture for now

change to alpha build tag

Change-Id: I45f1395c739a1d3042774b63ebc5d05b8b732e77