* fix: Removed MathJax CDN from header and set it up to download whenever a user goes to a Rosetta Code challenge
* Reworked slightly so that MathJax CDN script is only rendered once
* Simplified further
* Resolved conflicts and updated MathJax fallback to work like the one on donate.js
* Escaped backticks in scriptLoaders.js
* refactor: remove reliance on state