First pass at a retrying request handler.
Add path for localized error handling.
Make local retry strategies possible.
Honor return value of retryFuture.
Make retryImmediately honor retry strategy signature.
Merge remote-tracking branch 'upstream/master' into exception-and-retry
ProxyException -> StreamyRpcException
Adding first test cases
RetryingRequestHandler working.
Delete ProxyException.
RetryStrategy should return a Future<bool>.
Changes for code review.
Merge pull request #54 from alxhub/exception-and-retry

Use StreamyRpcException instead of ProxyException. Add RetryingRequestHandler which supports retry strategies.