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.
networkConnectionHandler  - Added MultiThreading mode
handler can be used for both single threaded or multithreaded mode.
Whole control flow (Basic) is now working
Opportunity list changes its background color when item is touched.
Merge pull request #3 from mittu-spidey/master

login activity test case completed