Switch to use stable branch of gmp-api
Merge pull request #1593 from ethanhugg/gmpapiversion

Switch to use stable branch of gmp-api
Rate control refine to fit MAX bitrate requirement
   1. should not set WELS_LOG_ERROR level in encoder initilization.
   2.fix UT bug
change info level as default level
Merge pull request #1595 from ruil2/update_2

should not set WELS_LOG_ERROR level in encoder initilization.
Merge pull request #1594 from lyao2/RC_maxBr_commit5

Rate control refine to fit MAX bitrate requirement
Add casts when converting from int64_t or double to int32_t

This fixes warnings when building with MSVC.
Merge pull request #1597 from mstorsjo/msvc-casts

Add casts when converting from int64_t or double to int32_t
1 update SHA1 table which have been broken by previous update; 2 enhance script to support more case(multi layer etc.)
Add subSPS pre-active check in CheckActiveSPS
Merge pull request #1599 from HaiboZhu/Debug_Add_subSPS_check

Add subSPS pre-active check in CheckActiveSPS
add a decoder status: float fActualAverageFrameSpeedInMs;          ///< actual average_Decoding_Time, includeing freezed picture
Merge pull request #1601 from dongzha/FixDecodeStatusFps

add a decoder status: float fActualAverageFrameSpeedInMs
fix a UT function
Merge pull request #1600 from shihuade/UpdateSHA1

update SHA1 table which have been broken by previous update
Merge pull request #1605 from sijchen/fix_ut1

fix a UT function