add text/plain support and change default aliseEmoji to NO

0.0.5

update CHANGELOG.md

add `gr_` to category

0.0.4

update readme.md

add _requestParameters and _requestHeader

0.0.3

add _requestParameters and _requestHeader

replace MJExtension to GreedJSON

0.0.2

Update README.md

network request for iOS, based on AFNetworking and MJExtension

0.0.1

Update README.md