Added Native Currency detail in Address detail page, fix #5

[reiven]

Add call to getaddressbalances api call to get native currency balance for Address detail page.

[reiven]

@bitcartel now i see you create another chance for this, but adding an if statement, checking the initial-block-reward but in our case we use the first-block-reward to "pre-mine" the blockchain so we're still not able to see the native currency balance.
Can this config parameter also added to the check?

Thanks