Disable call related code and optimize ProfilePicker
Merge branch 'feature-20140603-new-sampleapp' into feature-20140707-chatonly

Conflicts:
	OpenPeerSampleApp/src/com/openpeer/sample/OPApplication.java
	openpeer-android-sdk/src/com/openpeer/app/OPHelper.java
temporary
remove testing function
Put stack initialization in background thread
Delay login until stack initiatlization done
Merge new sample app branch
Merge branch 'feature-20140603-new-sampleapp' into feature-20140707-chatonly

Conflicts:
	OpenPeerSampleApp/src/com/openpeer/sample/OPApplication.java
	OpenPeerSampleApp/src/com/openpeer/sample/contacts/ContactItemView.java
	OpenPeerSampleApp/src/com/openpeer/sample/contacts/ProfilePickerFragment.java
	openpeer-android-sdk/src/com/openpeer/delegates/CallbackHandler.java