Minify HTML to Reduce Load time and Data

# Why?
Currently the HTML returned from conditional is large and riddled with blank newlines. In fact if you go to `/spring_evals` the page request is 403 kb! This affects load time, and can affect users data usage when visiting the page on mobile data. Conditional is slow, mostly because of the LDAP calls, but we can make an effort to reduce load times on the client when possible.

# The Fix
We can use a library called [flask-optimize](https://github.com/sunary/flask-optimize) to deal with this at each request. When attaching it to that same `spring_evals` route, it was reduced from 403 kb to 9.5kb and load time was reduced by a full 6 seconds!

# Downsides
We add a new dependency, and may have to deal with adding a few ` `s. Honestly minimal imo

# Okay, so just fix it
I will. As soon as #169 is merged. It's a separate change and I don't want to group them together. There's also a chance for a conflict if I submit a second PR. I'll just wait for the sake of avoiding such conflicts

Start at the `/spring_evals` route and review the status of #169 before changing anything, since the issue author intended to wait for it. Evaluate the flask-optimize integration there, checking that the response remains correct and that its size and load time improve from the reported 403 KB and six-second baseline.

Written by the indexing model from the issue text.