using WelsRound for all the double-int32_t conversion
roll back an unnecessary change
miss a branch for auto reference frame setting
Merge branch 'master' of https://github.com/cisco/openh264 into enc_quant
Merge pull request #867 from sijchen/rc_doublefloat_fix1

[Fix] using WelsRound for all the double-int32_t conversion
Merge pull request #878 from ruil2/enc_quant

miss a branch for auto reference frame setting
use 0 as maxnalsize default value.
Merge pull request #880 from ruil2/enc_quant

use 0 as maxnalsize default value.
modify dec API from void to explicit type, and some comments
Merge pull request #884 from huili2/API_dec_modify_master

modify dec API from void to explicit type