bitcoin address update

Our last bitcoin address was an online wallet hosted at Mt.Gox.

Mt.Gox has huge issues right now. To limit the risk of losing future bitcoin donations I now have an address from a new local wallet. I even calculated a nice address for us to use. :)

I send 0.0001337 BTC for testing. We can track/link to [this](https://blockchain.info/address/1RELVEjSHoKws6fc4sSDHZ7fLdwFTHYcK?show_adv=true) URL, so that everybody can see donations to reliveradio.
add additional ZIP download link for ressources on downloads page
fix #122
fix style of wordpress plugin links
update font-awesome links
fix #116
update changelog
update project links
add download icons
Merge branch 'hotfix/v.2.2.3'