improving code quality
removing unnecessary constants.js
taking out query retrieving process from index.jag file
Cleaned the utility.js.
Added new method inputNotNullOrEmpty(jsonObj, paramNameArray) to check input parameters
Changed to use inputNotNullOrEmpty(jsonObj, paramNameArray) from util.
Changed parameter retrieval to inputParameters.<param_name>.
cleaning zip-descriptor.xml
changing pom for stand alone building
updating readme file