creates tests for score recorder.
added Session class to keep track of who is logged in.
made some changes to score recorder.
merged in new master
Added writetofile method in score writer that writes a session to a text file in application support.
added stuff, see above
Added score reader and score writer tests.
Added score saving to the exam.
Merge branch 'master' into score-recording
Linked the student results professor page with the score reader and writer.
Merged master into score-recording.