Add upcoming and previous widgets to the dashboard
New jobs for upcoming and previous lectures
Tweak lecture list code to return different stuff depending on input
Revert "Add upcoming and previous widgets to the dashboard"

This reverts commit 2514f3b8a9fe244543b1f4dc300693851e0ba1b1.
Tweak the size of the widget

Disabling the layout drag was causing layout issues too, so I took that out for now
Change colour of the previous lectures widget
Make the user icons a bit smaller
Fixed the tests
We only want to see forthcoming courses
Make links underlined on `:hover` and `:active`
Merge pull request #8 from theodi/feature-add-previous-lectures

Add previous lectures to the dashboard