Less verbose stack trace

[apotonick]

Do we really need all the circuit.rb lines? Not really, with wtf?'s exception trace, right?

[yogeshjain999]

Well earlier, we used to capture the exception and print only 3 lines of backtrace. But while changing the implementation to support both the cases (with / without exception trace), we don't capture the exception any more and let it move on.

Do you think we should make backtrace lines printing configurable ? But that will purge the exception.