Our application JS is bloated with minified libraries, while our actual
application Javascript barely amounts to more than two hundred lines.
I propose removing these libraries from our sass file, and instead
load them as separate resources in `<link>` and `<script>` tags.
This has several advantages:
- By using common CDNs, users are likely to have many of these libraries
cached already.
- Even if the files aren't cached, the CDN is likely to deliver them
faster.
- We can use the HTML5 'async' attribute to load these libraries
asynchronously, so users aren't held up while they download.
- Our fully compiled application JS is much, much smaller, which
reduces the load on our host.
Also, on the topic of load times, I realized that in #152 that one of the
images was a PNG, not a JPG. I had tried optimizing the image, but I didn't
realize that it wasn't a JPG like the others. Here, I converted it to a JPG,
and it is significantly smaller, and it is visually unchanged.
I'm having some difficulty testing on my local machine, so I would appreciate
some additional manual testing before merging this.
