Plan to address #112, #149, and #151

[Asmor]

There are a bunch of legacy issues that are going to be a pain in the ass to tackle, and are going to result in users losing data. It's unfortunate, but c'est la vie.

Specifically, the issues are

• D&D Beyond Integration #112: Currently a huge pain in the ass due to the way the legacy sheets are humongous
• Implement a plan for splitting up the master sheets #149: Splitting the sheets is something I want to do anyway, and that will also be helpful for implementing D&D Beyond Integration #112
• Issue with shareable links due to HTTP and HTTPS having separate localstorage #151: I want to migrate everything over to HTTPS

Additionally, I'm probably going to rip out the environments (since they're almost entirely unused except in the oldest content, and they don't match any other environment lists) and the combat thing (because entering the AC, HP, and Initiative for every monster is a huge pain in the ass, and I don't like supporting the combat stuff anyway). Will maintain the link to Improved Initative, so people can still export combat encounters over there to run them.

So here's my rough plan. No timeline yet.

Phase 1: Implement warning to users that in the near future, all data will be wiped.
Phase 2: Rip out combat stuff.
Phase 3: Behind the scenes, start working on splitting apart the sheets. This shouldn't be that hard.
Phase 4: Once everything in the background is ready to go, pick a date to rip off the bandaid and update the warning with that date so people can plan accordingly.
Phase 5: Take the site down, update the server to forward HTTP to HTTPS, push out the updates, bring it back up.
Phase 6: Steal underwear
Phase 7: ???
Phase 8: Profit!