before changing AhIdUser & AhUser logic
after fixing AhUser logic (#important!)
Changing EnterSquare, SendMessage logic & adding SquareUser Model
Merge branch 'master' of https://github.com/hongkunyoo/athere-android

Conflicts:
	AtHere/src/com/pinthecloud/athere/database/UserDBHelper.java
	AtHere/src/com/pinthecloud/athere/fragment/SquareListFragment.java
Changed Preference abusing Usage
Merge branch 'master' of https://github.com/hongkunyoo/athere-android

Conflicts:
	AtHere/src/com/pinthecloud/athere/fragment/SquareProfileFragment.java