fix Loop filter error under multithreads on encoder when #TEST_BED enabled
add new contributors
Add arm UT for Sad,IntraSad,IntraPred.
fix deblockIDC and mutithread logic error
Merge pull request #1294 from zhilwang/arm-ut

Add arm UT for Sad,IntraSad,IntraPred.
Merge pull request #1288 from lyao2/threadIDC

fix Loop filter error under multithreads on encoder when #TEST_BED enabled
Merge pull request #1293 from huili2/contributor

add new contributors
Merge remote-tracking branch 'upstream/master' into travis.osx