classroom 6.x-1.0-beta5

We though that beta4 was going to be the last of the beta releases, but we were wrong. This new version brings some bug fixes and UI improvements.

• Fixed translations files in classroomquiz and classroom_privatemsg modules.
• Fixed the checking of grade percentages sum.
• Fixed links to 'answer assignment' (in assignments lists). Also, a new hook classroom_response_url has been added.
• Added a responses tab to assignments. Teachers can assign grades in that tab.
• Some minor test suites improvements.

At this time, we plan to release yet another beta and, after that, we hope to publish the first release candidate. We're sorry about being late, but we wanna deliver something that you can use :)

Enjoy!