Load react and jquery Javascript from local

Instead of eg fb.me, which is blocked in some places.

Note that later we ought to combine our JS into a single file a la the
main website. See https://www.pivotaltracker.com/story/show/75439298 [#75439298]

https://www.pivotaltracker.com/story/show/75500588

[Delivers #75500588]
Merge pull request #23 from sealevelresearch/load-js-from-local

Load react and jquery Javascript from local