Simplify
Improve readability
Handle service crashes

It's more about preventing the library from crash
when something fails down the road. 

Let's say guys at counterparty.co have a bug which
breaks their toys. Obviously our library won't 
show any information from them but it'll still show
information from services that are fine.

Nice.
Notify about service errors
Merge pull request #5 from mondoreale/feature/service-crash-handling

Service crash handling