Add jetty-runner maven plugin for Heroku
Add web to Procfile
Update public IP of database
Add cloud profile option

It looks Heroku is not passing the system.properties because of the following
warning:

Could not obtain connection to query metadata : Cannot load JDBC driver class
'${database.driverClassName}'
Configure ClearDB URL
Add BoneCPDataSource to cloud profile

List of changes:

 - Variable hibernate.dialect is now defined in properties file.
 - Delete database.{env}.properties from Github.
 - Add H2 and PostgreSQL to database.template.properties.
 - Add list of participants to events.
Delete diaulos_dump.sql
Upgrade to Java 7
Add bonecp and h2 libraries