add preprocessing parameter for screen content
Merge pull request #592 from ruil2/enc_processing

    add preprocessing parameter for screen content
add ExpandPic encoder unit test
Merge pull request #593 from ganyangbbl/encUT_ExpandPic3

add ExpandPic encoder unit test file
Add feature search basic functions
    add scene change detection in workflow for screen content
Merge pull request #596 from ruil2/enc_processing

    add scene change detection in workflow for screen content
Merge pull request #595 from sijchen/fme_merge12

[Encoder ME] Add feature search basic functions
remove unused variable
Merge remote-tracking branch 'upstream/master' into encUT_EncoderMB