Update to Vaadin 7.1.5
Merge branch 'master' of github.com:ondrej-kvasnovsky/grails-vaadin-plugin
Merge remote-tracking branch 'upstream/master'

Conflicts:
	grails-vaadin7-plugin/application.properties
	grails-vaadin7-plugin/grails-app/conf/BuildConfig.groovy
	grails-vaadin7-plugin/plugin.xml
updated to version 7.1.6
changes by grails upgrade run with 2.3.0