create complexity analysis for screen content
Merge pull request #584 from ruil2/vp_update

create complexity analysis for screen content
modify the output directory of welsvp in VC project.
Merge pull request #585 from ruil2/vp_update

modify the output directory of welsvp in VC project.
Add basic cross search functions and its unit tests
Merge pull request #586 from sijchen/me_merge72

[Encoder ME] Add basic cross search functions and its unit tests
Adjust function interface and add void function for further coworking, adjust test accordingly
Merge pull request #587 from sijchen/me_merge83

[Encoder ME] Adjust function interface