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
add log for ref pic buffer memory alloc
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
Log the encoder version later in the initialization

Previously, the encoder logging was done in InitEncoder(),
which is called from the constructor. Therefore, it was impossible
to override the log level, to silence this message.
Merge pull request #1607 from mstorsjo/encoder-init-log

Log the encoder version later in the initialization
fix decodestatus uiEcRatio calc bug
add flag to count EC Mbs due to ref error
add UT