FilterMenu updated - bug fixes, UI changes, Update button added.
OpportunityList added - basic layout and sample data is given
LoginAcitivity added - basic offline validations added..
NetworkConnectionHandler modified - thread is included. 
network thread can be created and run on sendRequest() is called.
Login Usecase - Workflow is being implemented.
Login usecase - workflow implemented
OpportunityList - basic istView with some UI changes
Model package moved to default package - refactoring in packages are
made
Working Login workflow - 
Just flow is working (getting response from server.)
No Thread is required for onClick() method of a button.
Merge pull request #5 from mittu-spidey/master

updated version - network thread is removed from networkHandler