opps

opps #2
Squash commits of @rascarlo

add support for overriding build.prop settings

comment out the build date assert

Debugging TRUE

Signed-off-by: Paul Beeler <sparksco@gmail.com>

Conflicts:
	tools/releasetools/ota_from_target_files
Merge remote-tracking branch 'sd/kitkat-wip' into kitkat-wip