SAMZA-413: Correct and expand BlockingEnvelopeMap javadoc
SAMZA-400; default to -server for am and samza container
SAMZA-412; replace assert calls in tests with appropriate JUnit assert methods
SAMZA-407; add ability to drop exceptions rather than fail container and add metrics to track
SAMZA-417: Add a configuration table page link in the documentation
Merge branch 'master' of github.com:apache/incubator-samza into SAMZA-375