Adding NickName duplicated Check
Merge branch 'master' of https://github.com/hongkunyoo/athere-android
Merge branch 'master' of https://github.com/hongkunyoo/athere-android

Conflicts:
	AtHere/src/com/pinthecloud/athere/helper/UserHelper.java
	AtHere/src/com/pinthecloud/athere/util/AsyncChainer.java