Overhaul of stupid bad code

[king-millez]

In conjuction with the backend updates, the code for legistream-site is being updated for maintainability and efficiency.

New stuff

This new version of Legistream now dynamically generates stream pages and instances, rather than previously having them hard-coded into the package, which took up a lot of unnecessary space.

This PR

• closes #20
• will close #15 (ACT Legislative Assembly has upgraded AoD)
• will close #13
• progresses #7
• will close #24
• will close #22
• will close #23

[king-millez]

Main priority is now mobile support, #13