core-util/excel-util : added learnr-util module
added excel object mapper
excel-util : added excel entity beans and test cases to read excel file
as List of beans.
Merge branch 'stanford-nlp' into excel-util

Conflicts:
	java/learnr-core/pom.xml
excel-util : text processing classes(place holders only) are added.
Merge remote-tracking branch 'origin/excel-util' into stanford-nlp

Conflicts:
	java/learnr-core/src/main/java/com/learnr/core/classification/GeneratingMatrixfromMaps.java
	java/learnr-core/src/test/java/com/learnr/core/classification/LogReg.java
	java/learnr-core/src/test/java/com/learnr/core/classificationtest/classTest.java