Write offsets to datasets only on changes
Update README.rst

CDAP-646 Making name consistent.
Moved the count right before its usage
Merge pull request #10 from caskdata/feature/write-offsets-on-changes

Write offsets to datasets only if message is processed
Merge remote-tracking branch 'upstream/develop' into CDAP-539-etl-pack-app
CDAP-539: Added compiler plugin to plugin management; Set specific parameters for etl-pack-core to build with internal API.
CDAP-539: Renamed package from co.cask.att.dictionaryproc to co.cask.att.dictionary.
CDAP-539: Updated copyright clause to Cask Data, Inc.
CDAP-539: Updated docs; Response string with error message if no dictionary found.