Added a function header (for use by priyan)
Added content types and content paths in Contract class. Started implementing the ContentProvider
Implemented the getType method in ContentProvider.
Added helper methods in contract class for building the different Uris apart from the basic content_uris
Implemented delete() and partially insert() of the ContentProvider. Added TestEnvironmentProvider for testing the Content Provider (Started out with a copy of TestEnvironmentDb). Made deletion at the beginning using delete() function of content provider, and added test for getType(). Also changed the inserts, wherever possible, to Content provider inserts.
Revamped the Uris used for Content Provider. Almost done with insert. Some environment uri inserts are left. Updated test cases appropriately.