v0.2.1.4

- Fixed fetching trades with no API key. The bot can now be used to
monitor trend without an API Key (but it will not be able to trade of
course)

- Experimental implementation of MtGox API v2 (set "useAPIv2=true" in
file "background.js" if you want to test. But be warned: It's not
extensively tested, so use at your own risk!)