add MinCr checking and output warings if the MinCr isn't met
add a setoption for further setting
Merge pull request #1322 from ruil2/MinCr_waring

add MinCr checking and output warings if the MinCr isn't met
modify delivery status interface
add debug logs
Merge pull request #1331 from sijchen/add_setoption

[Encoder] add setoption of 'isLosslessLink' for further strategy tuning
modify version info in enc/dec
Merge pull request #1333 from huili2/print_ver_master

modify version info in enc/dec
fix pps caused death loop issue
Merge pull request #1330 from ruil2/delivery_status

modify delivery status interface
Merge pull request #1335 from lyao2/fixppsbug

fix pps caused death loop issue
Merge branch 'master' of https://github.com/cisco/openh264 into enable_ltr0
fix a LTR range problem when LTR num is larger than 2