Cleanup

Just did a bunch of cleanup.

Removed announcements, attendance, attendances and notifications for assets/javascripts, assets/stylesheets,
controllers/dashboard, helpers/dashboard, app/models and views/dashboard.
This will work and is needed, but I would recommend trying to limit a branch and/or pull request to a single concern. For example, this one is about cleaning out stuff we don't need so limit it to only removing files instead of mixing in changes/additions to other areas. Don't worry about it for this one, though. I'm probably gonna merge this in a second.