Contact My Doctor implemented

Core functionalities implemented.
-Contact class
-Main activity displaying Contacts
-storage and retrieval on local storage
-add new contact by selecting from contact list
-removal of Contacts
-added functionalities to make phonecall, send text message.
Unintentional phone call Bug Fix

Upon pressing the return key from the contact option activity the
activity return value was 0, which coincided with the return value to
make a phone call.
Solved it by changing phone call return id.
Final commit

Refactored some code
Merge branches