Made BindException a RuntimeException

*Rationale:* In the many cases we use Tang in REEF, we haven't had a single place where we were able to recover from this exception in any other way but to rethrow it as a RuntimeException: In all cases, a BindException is the result of a bug in the code, not an einvironment problem which we can recover from with code.
Merge pull request #171 from Microsoft-CISL/weimer_bindexception

Made BindException a RuntimeException