[FEATURE] Trade: Ripple URI for trade tab (RT-1450)

e.g. with parameters ```type=buy&first=USD:~Bitstamp&second=XRP&amount=0.0001&price=0.0027&max=0.1```

![2014-11-10-105818_1366x768_scrot](https://cloud.githubusercontent.com/assets/395821/4970607/1e2b5960-6886-11e4-9ad1-20b2218c179e.png)