Added an event handler to clean out the vaadin-client-7.*.*.jar from
before creating the war archive, reduces war size by 15mb
Added a config property for toggling whether the vaadin-client jar is
included in the war archive, property 'grails.vaadin.removeClientJar =
false' in the Config.groovy property file will disable this function.
Merge pull request #6 from Okram1/clean-client-jar

Clean client jar removed from final war file.