Refactor questions off modals

[tpavlek]

Questions no longer use data-attributes on the modals.

The javascript has had significant changes, primarily:

• Moved majority of buzzer functionality into a buzzer module
• Moved majority of functionality of current question state into a question module
• Added a fuckload of documentation about the twiddly bits. Docblocks good unit.

Everything should now be working, with the new styles. Testing will need to be done in Internet Explorer because of flexbox.