Requests sending a reception complete.
Other various improvements.
Merge remote-tracking branch 'origin/master'

Conflicts:
	Lectures+ Lecturer/src/com/InstantFeedback/Lecturer/LecturerPresentActivity.java
	Lectures+ Library/src/com/InstantFeedback/Library/Response.java
Merge remote-tracking branch 'origin/master'

Conflicts:
	Lectures+ Lecturer/src/com/InstantFeedback/Lecturer/LecturerPresentActivity.java
Merge remote-tracking branch 'origin/master'
Fixes to lecture presentation navigation