Fix potential issue for neon implement on encoder mode decision.
Error happens when ME_REFINE_BUF_STRIDE is not equal to 32.
add EC frame/slice copy.
[Encoder UT] sample UT code refactor
    update level_idc setting
Merge pull request #704 from JuannyWang/sampleNow

[Encoder UT] sample UT code refactor
Merge pull request #705 from ruil2/enc_update_2

    update level_idc setting
overwriteactivesps
Merge pull request #707 from dongzha/FixIssueMcNEON

Fix potential issue for neon implement on encoder mode decision.
     add complexity calculation in workflow
Merge pull request #708 from ruil2/enc_complexity_update

     add complexity calculation in workflow
Merge pull request #709 from huili2/ec_mb_check

add EC frame/slice copy.
rename some varialbes
turn off TestHorizontalSearch_SSE41 unit test becasue of random issues
Merge pull request #713 from licaiguo/overwriteactivesps

overwriteactivesps
Merge pull request #712 from ruil2/enc_rename_1

rename some varialbes
some traces
Merge branch 'master' of https://github.com/cisco/openh264 into enc_level
add decide frame type for screen content