CDAP-610: Ported TwitterSentiment app to use Services instead of Procedures
CDAP-610: refactored unit test
CDAP-610: replace apache HttpClient by HttpURLConnection
CDAP-610: update main.js
CDAP-610: fixed PR comments
CDAP-610: update cdap version
refactored service to use QueryParam
CDAP-610: added @DefaultValue to service
CDAP-610: added @DefaultValue to counts method
CDAP-610: removed unused variables
Merge pull request #36 from cybervisiontech/CDAP-610

CDAP-610: Port TwitterSentiment app to use Services instead of Procedures