Removed SortByScoringSystem
Updated UML
Updated UML, Removed Scoring System Sort
Merge branch 'master' of https://github.com/CMPUT301W14T05/Team5GeoTopics

Conflicts:
	GeoTopicsActivity/src/ca/ualberta/cs/team5geotopics/BrowseActivity.java
	GeoTopicsActivity/src/ca/ualberta/cs/team5geotopics/CommentListModel.java