Incremented plugin version on dev branch to 1.0.3-dev
Modify umeng key value to distinguish xFace 3.1 and xFace 3.2
intial readme
[Done-354][iOS]Update Umeng sdk to 2.2.2 (without IDFA)
[Doing-348][iOS]Added descriptions for preferences
[iOS]Updated descriptions for preferences
Modify config.xml path error in plugin.xml
Updated version and RELEASENOTES.md for release 1.0.3