Added discussion_entries to Submission.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/main/java/com/instructure/canvasapi/model/Submission.java
Added discussion_entries to parcelable
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/main/java/com/instructure/canvasapi/model/Submission.java
Merge pull request #52 from bradylarson/master

Added discussion_entries to Submission.