Added configuration for sentiment engines
added configuration for 4 sentiment analysis tools
Sentiment engine API's are now functional. Four have been added.
modified alchemy output so that all sentiment enigines have consistent output
modified viralheat output so that all sentiment enigines have consistent output
added senitmental to list of sentiment analysis engines
added senitmentalizer to list of sentiment analysis engines
Merge pull request #2 from kelmerp/sentiment_apis

Sentiment apis