publish to Bower registry

[davidchambers]

I'd like to use the exported method names in projects which target browsers (in addition to Node). In order to do so, we must first:

1. add environment detection to index.js, and export as window property in browser context;
2. add bower.json; and
3. run bower register fantasy-land git://github.com/fantasyland/fantasy-land.git.

I'll submit pull requests for 1 and 2 if maintainers are on board. :)

[SimonRichardson]

@davidchambers can you make a PR.

[davidchambers]

@SimonRichardson, you can perform step 3 now. :)

[SimonRichardson]

This is done now!