OpenBazaar/OpenBazaar — pull request #597 by Renelvon (2014-09-17 12:15:57+00:00)
Title: OS-agnostic browser start.

### Motivation:
* [os.uname](https://docs.python.org/2/library/os.html#os.uname) is only available in 'recent flavors of Unix', and won't work on Windows.

### Changelog:
* Use python's [webbrowser](https://docs.python.org/2/library/webbrowser.html) to open the browser.