Added rudimentary stress test script.
Merge branch 'master' into stress
Merge branch 'master' into stress
Renamed Actor#receive to Actor#act to align with Scala.
Updated all 'channel' references to 'actor' in Actor specs.
Updated all 'channel' references to 'actor' in Actor class.
Made rudimentary stress test rake task.
Merge branch 'master' into refactor/thread_pool