Added support to read the script file from the classpath. #302
Test case to pass in and return int type of arguments and return type. #302
Test case to pass in and return real type of arguments and return type. #302
Test case to pass in and return string type of arguments and return type. #302
Sample script for RScriptOperatorIntTest.java. #302
Sample script for RScriptOperatorRealTest.java. #302
Sample script for RScriptOperatorStrTest.java. #302
Removed RScriptOperatorTest.java because the tests have been individually added. #302