- Add interface for CtxClientHelper and CtxClientCallback in android
api.
- Add ContextClientInvocationException in android remote hepler.
- Add ContextClientHelper in the android remote helper (not completed).
- Add intent exception value in android api and use it for exceptions
in AndroidContext service.
Merge branch 'development' into ContextAndroid_Helper
- Implement create (entity, attribute, association), lookup and retrieve
methods in ContextClientHelper for the Android Context service. 
- Add exception handling classes for the context client in the android
external api.
Merge branch 'development' into ContextAndroid_Helper
- Test ContextClientHelper with createEntity method.
- Modifications in intents and methodArray in internal and external
android API (ICtxClient & IInternalCtxClient).
Merge branch 'development' into ContextAndroid_Helper
- fix in retrieve method in ContextClientHelper.
- add tests for createAttribute, createAssociation, retrieveAttribute
for ContextClientHelper.
- Add lookup in ContextBrokerCallback of SocietiesAndroidContext. 
- Add test for lookup method in ContextClientHelper.
Merge branch 'development' into ContextAndroid_Helper
- fix lookup in ContexClientHelper when retrieving callback
Merge branch 'development' into ContextAndroid_Helper
- Test in TestContextClientHelper to lookup for attribute types. 
- Cleanup logs in ContextClientHelper and ContextBrokerBase.