Add essential libraries for Hibernate 3.2

Hibernate3.2
JDBC (Oracle)
Setup Hibernate and create a simple demo program

1. Create Hibernate configuration files
2. Create HibernateUtil.java to manage Hibernate session.
3. Create a simple demo SimpleMapping.java
Ignore OSX files in git
Change the name of SimpleMapping to SimpleDemo
Demo on Hibernate Cache

1. 1st and 2nd level cache
2. Modify identifier on cache