student exam view

This is the student view of a task

the url is /task/id

![image](https://cloud.githubusercontent.com/assets/2651858/5241064/d1ec2ac0-78d9-11e4-9d01-0e9da13ce954.png)

In the future it may make sense to use database objects for every type of task piece, but for now this works.
remove this