Added persisted assignment grading.

- slight tweak to grading algorithm.
Added assignement grading for first part of TP1.
Add reasons for removing points and changed to !binary grading system

- also upgrade to Play 2.1-RC2
Persist grading for Git part (Part 1)
Modify Procfile for Heroku database
Fixed assignement part denomination
Changed local environment to use Postgre SQL

also change the names of Part 1 and Part 2 for TP1 Part 1 and TP1 Part 2
Changed implementation of grading for v8
Merge branch 'master' of https://bitbucket.org/jedesah/log1000-tp

Conflicts:
	app/controllers/Application.scalat
Trying database configuration for Heroku
Reverting last try
Trying something out
Trying something out (part2)
Try 3
Think fixing up a brain cramp in Procfile
This might actually work
There should not be database evolution stuff in Global.scala
Fix minor mistake in Enonce and add details to the delete a Task section
Reformutaed parts on Delete a Task
Application is now more DRY. Submission should be more intuitive and slightly more robust.