Merge branch 'develop' of https://github.com/astaxie/beego into develop

comments for godocs

beego:fix captcha filter router

beego: change the version to 1.2.0

release 1.1.1

V1.1.0

change version from 0.9.9 to 1.0.0 RC1

change version 0.8 to 0.9