Ignore IDEA and built files.

Signed-off-by: Nigel Magnay <nigel.magnay@gmail.com>
Create a maven plugin for executing the PropertyUtil generation.

Signed-off-by: Nigel Magnay <nigel.magnay@gmail.com>
Create a separate maven project for mondrian-errors so that
this can be used by the resource generator.

Signed-off-by: Nigel Magnay <nigel.magnay@gmail.com>
Create an initial maven pom.xml for building via maven.

Signed-off-by: Nigel Magnay <nigel.magnay@gmail.com>