Committing mail classes, as well as change to pom.xml for providing the javax.mail dependency.
Formatting (removes trailing spaces mostly).
Puts javax.mail:mail dependency into the standard location in dependencyManagement section and makes it an optional dependency for those who don't use it.
Adds Connection.setReadOnly calls to open connection methods in SqlDatabase.
Changes DefaultDatabasePing to check all delegate databases if the default is an aggregate.
Deprecates initializers.
Fixes javadoc warnings.
Merge branch 'master' into feature/mailProvider
Changes mail-related API names to be more consistent.