added ES id fields in CommentModel. Worked on "return values" for some
services.
Merge branch 'slmyers'
mergeing commentmodel changes and geoapplication changes.
Conflicts:
	GeoTopicsActivity/src/ca/ualberta/cs/team5geotopics/CommentModel.java
	GeoTopicsActivity/src/ca/ualberta/cs/team5geotopics/GeoTopicsApplication.java
Merge branch 'master' of https://github.com/CMPUT301W14T05/Team5GeoTopics
merging changes to CommentModel and GeoTopicsApplication