Reduce load times

The goal here is to optimize load time for a fresh session, i.e. navigating to https://popcode.org without having been recently logged in, no gist or snapshot URL, etc.

• Investigate lodash’s contribution to bundle size—seems like we’re not getting the benefits of a la carte module loading. Should we use the a la carte packages instead?
• Replace or trim down moment
• Replace or trim down text-encoding
• Asynchronously load libraries (e.g. the inlined copy of jQuery that’s used when it’s enabled for a project)
• Asynchronously load vendor code that isn’t required to bootstrap a fresh session (e.g. GitHub, Firebase clients)
• Vendor split to improve cacheability

Webpack visualizer is a great tool for finding the worst offenders in our bundle size.

[ajgreenb]

Leaving this here for later:

http://webpackmonitor.com/

[ajgreenb]

@outoftime we already use the *deep breath* inline-chunk-manifest-html-webpack-plugin for this!