Add FME unit test
Merge pull request #787 from sijchen/fme_merge97

[Encoder ME] Add FME unit test
Merge branch 'master' of https://github.com/cisco/openh264 into md_merge11

Conflicts:
	codec/encoder/core/inc/svc_motion_estimate.h
	codec/encoder/core/src/encoder_ext.cpp
	test/encoder/EncUT_MotionEstimate.cpp