Merge pull request #1 from apache/master

pullling in apache master
Backoff and token Utils classes implemented and tested
STREAMS-143 | Refactored InstagramProvider to accept date ranges for user updates
STREAMS-143 | Methods to set configuration in code and code review feedback
Merge pull request #2 from apache/master

Apache master merge 2014/08/13
Merged master
STREAMS-143 | Code review feedback changes
STREAMS-143 | Fixed accidental removal of shutdownNow() call