use json encoder
Merge branch 'dev' into 'master'

局部修改

RT
add tasks
Merge branch 'master' of git.hunantv.com:tonic/dot
add config add logger
Merge branch 'dev' into 'master'

增加config和logger

RT
use real task
Merge branch 'master' of git.hunantv.com:tonic/dot

Conflicts:
	models.go
	restful_apis.go
fix several bugs
use logger instead
use config, add config sample