Merge branch 'release/update_SDK_v0.8.1.3'
change https://github.com/baasio/baasio-facebookLogin-iOS
Updated Using-facebook-account-to-sign-in-or-up (markdown)
fix BAAS-46 BAAS-43 Push SDK 사용성 개선- 문서화
설명 순서 변경
add about UIImageView support
- add network API async sample code - add Non-static user signup API sample code
fix BAAS-72
fix BAAS-73
Updated SDK Guide (markdown)
add pushOn/Off
Updated Home (markdown)
Updated Advanced feature (markdown)
Updated Using facebook account to sign in or up (markdown)
Merge branch 'master' of github.com:baasio/baas.io-sdk-ios.wiki
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