Implemented ServiceProxy Event Producer where in UDSOIO,Thrift and HTTP Handlers would publish events which interested Consumers can subscribe to.
Merged Publisher - Subscriber Module into Task Module. Improved ServiceProxyEventProducer and removed ServiceProxyEventHelper.
Merge changes of https://github.com/Flipkart/phantom

Abstracting executor repository and executor so that implementations get flexibility.
Made ServiceProxyEvent publishing work with new abstractions. Did some refactoring.
Merge pull request #2 from amanhigh/master

	Implemented ServiceProxy Event Producer where in UDSOIO,Thrift and HTTP Handlers would publish events which interested Consumers can subscribe to.