update trace output
remove redundent lines
Merge pull request #1314 from ruil2/add_trace

update trace output
Avoid warnings about comparison between signed and unsigned

There's no need for these variables to be explicitly unsigned.
This also matches the function above.
Fix following IntraPeriod set issue
1. In WelsInitSps function, if kuiIntraPeriod is huge, uiLog2MaxFrameNum might be bigger than 15, which may introduce illegal H264 bitstream.
2. if pSvcParm.uiIntraPeriod is not zero (e.g. 14) at the initial, it will init sps.iLog2MaxPocLsb. to 5.
 But if I changed pSvcParm.uiIntraPeriod to 40, sps.iLog2MaxPocLsb. is still 5, need to recalcuted this parameter.
 (Same with uiLog2MaxFrameNum.)
Merge pull request #1316 from mstorsjo/avoid-warnings

Avoid warnings about comparison between signed and unsigned
Avoid using uninitialized memory in the motion estimation tests
Merge pull request #1315 from dongzha/RemoveIntraPeriod

Fix following IntraPeriod set issue
Merge pull request #1317 from mstorsjo/avoid-uninitialized-test

Avoid using uninitialized memory in the motion estimation tests
add release note for v1.1.1
fix auto threadIdc issue
Merge pull request #1318 from ruil2/threadIdc

fix auto threadIdc issue
Merge pull request #1319 from huili2/release_note_1.1.1

add release note for v1.1.1
Merge remote-tracking branch 'upstream/master' into travis.osx