Allow node.js Buffers in browser, since browserify provides them automatically. Fixes #139
Merge remote-tracking branch 'stuk/master' into humphd-master
Don't include the Buffer polyfill in dist/ files.

In a browser, there are multiple implementations of nodejs' Buffer. If
we let browserify includes its own, we won't play nicely with the others
(it uses `instanceof` and doesn't accept other implementations).
With this patch, we don't include any implementation but we let the
environment provides (or not) the Buffer.
Merge pull request #158 from dduponchel/issue_140

Don't include the Buffer polyfill in dist/ files.