Ignore maven build directory (target/).

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Dependencies are now resolved using Maven. Version is now in root pom.xml instead of build.props.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>
Using latest version of Beam.

Signed-off-by: Egon Willighagen <egonw@users.sourceforge.net>