Added Primary and Secondary Wallets

Can now use multiple wallets, requires the usage of a bool. So to use
primary the code is:
IBaseBtcConnector baseBtcConnector = new BaseBtcConnector(true);
In appconfig now use keys "PrimaryUsername", "Primary Password" and
"PrimaryServerIp". As well as "SecondaryUsername" etc

Useful for a large number of scenarios.