There is not, as of patch "Annoyed Koala" (9 Dec. 2013), a way to rebind keys within the game itself. However, [AutoHotKey][1] can let you rebind whatever keys you want. (It's also nice for rapid clicking on that dang craft button)
Key binding is a planned feature, but this is still early beta, and the devs have a multitude of other stuff to do too. [1]: http://www.autohotkey.com/
