Modify ARM32 Neon code for Expand Chroma Picture, when UVWidth%16==8.
modify sequence to fix bug for LTR feedback info
add DPB management if frame loss happens
Merge pull request #718 from huili2/LTR_feedback_info

modify sequence to fix bug for LTR feedback info
Merge pull request #720 from huili2/ec_add_ref_mgt

add DPB management if frame loss happens
Merge pull request #719 from dongzha/MC

Modify ARM32 Neon code for Expand Chroma Picture, when UVWidth%16==8.
fix the GetOption: bit rate part
add FME switch logic
Merge pull request #721 from sijchen/fix_one_getoption

fix the GetOption: bit rate part
Merge pull request #722 from sijchen/fme_merge75

[Encoder ME] add FME switch logic
Merge remote-tracking branch 'upstream/master' into travis.osx