Issue 645

https://github.com/mastercoin-MSC/omniwallet/issues/645
The AssetsTypesController is for displaying the AssetsTypes on the Wallet Overview page and shouldn't be added here, Values of coins are get through the Appraiser service and not through this controller,  the getBitcoinValue function should be either on the WalletAssetsFormController (if this functionality is intended for all the Assets Related Pages like buy/sell/send/issuance) or on the WalletSendAssetsController if it's just meant to be used there.

This is critical to be consistent with our architecture.