Added a central service for doing address balance lookups.
Added a central service for doing address balance lookups.

OmniLayer/omniwallet,achamely/omniwallet,OmniLayer/omniwallet,Nevtep/omniwallet,VukDukic/omniwallet,Nevtep/omniwallet,Nevtep/omniwallet,habibmasuro/omniwallet,achamely/omniwallet,achamely/omniwallet,habibmasuro/omniwallet,habibmasuro/omniwallet,VukDukic/omniwallet,OmniLayer/omniwallet,habibmasuro/omniwallet,achamely/omniwallet,OmniLayer/omniwallet,VukDukic/omniwallet,Nevtep/omniwallet