Split into component library and sample app

[andywer]

Hey guys. Pretty cool work! :)

I just have one suggestion: Right now it shows quite nicely how a trello-like board can easily be implemented using react/redux. But unfortunately it is really just the whole sample app right now.

It would be really cool to split it into a library exporting the board components and this sample app based on the lib. This way one could easily use the board in a real-world application.