Feature/blockchain connect

Show the donations addresses with their nb of coins parsed from blockchain:

![donnation addresses with nb of coins](http://i.imgur.com/xCGvcra.png)

The second address is my own, to verify that we have a good number.
Work in progress, I'll try to add as many addresses as possible.

Please start thinking about the alpha design. We want to show all our addresses as example, then we'll switch our addresses with the users own addresses