Install acts_as_list gem
Allow training questions to be re-arranged by changing their asm-qn position
- In `training#show's view`, turn the tbody of the questions table into a ordered list, sorted by the questions's asm-qn's `pos` attribute
- Add routes & controller to handle changing `pos` attribute of asm-qns
- Make AJAX call when the questions table is reordered, updating the asm-qns's `pos` attribute
- Styling to make the questions's title looks like it's draggable
Remove acts_as_list gem, as it is not used