Added interaction with database using JPA(Hibernate).

-added dependencies in pom.xml
-added session factory and transaction manager into  -servlet.xml
-added hibernate annotations into employee model
-reworked read/insert methods in the employee dao
-added simple service layer
Small fix
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/com/academysmart/model/Employee.java