Corrected StoryFragment accessor/modifier methods for new fragment ID implementation
Added fragment ID attribute and modified branch removal method to use fragment IDs. Added new public accessor for the fragment ID.
Change collection of StoryFragment into a HashMap with Integer keys and StoryFragment values. Added method for getting Story-scope unique fragment IDs. Modified public fragment removal method to take an int ID parameter. Corrected branch removal method for new fragment ID implementation. Associated documentation.
Merge branch 'master' into FragmentIDImplementation
Merge branch 'master' into FragmentIDImplementation
Added public mutator for fragment ID
Adding a fragment now properly sets the fragment's ID attribute to the next available ID.
Merge branch 'FragmentIDImplementation' of github.com:CMPUT301F13T06/ClassProject into FragmentIDImplementation
Merge branch 'master' of github.com:CMPUT301F13T06/ClassProject