Added automated building using Gradle.

Build file includes the following:
1. Gradle wrapper - allows running gradle without downloading/installing gradle on your machine.

2.  Dependencies for Spring, Hibernate, Log4j, SL4J and MySQL connectors.

3. Tasks and plugins for eclipse project setup,  compiling running java apps, running/debugging the app on tomcat and for building wars.
Sample property files for configuring database and logging.
Updated Readme to give a sense of how to work with the source code and run the app.
To make Git ignore the unnecessary files like jars and temps and output builds.