add log for ref pic buffer memory alloc
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
    update maxbitrate to control bitrate vary range
fix typo bug
Merge pull request #1606 from huili2/log_for_memory_realloc

add log for ref pic buffer memory alloc
Merge pull request #1609 from dongzha/NewFixEcRatioCalc

New fix ec ratio calc
Merge pull request #1608 from ruil2/bits_update

    update maxbitrate to control bitrate vary range