[WIP] Homepage map

Adds the map to the homepage.

- [x] Map
- [x] Plot markers with links to their relative environment pages
- [ ] Style markers
- [ ] Style map

![BRB goin 4a swim](http://31.media.tumblr.com/64d7dc575a192d7638e3b91b1907cd44/tumblr_n1fbsjwb0L1r3gb3zo1_400.gif)