Fixes issue https://jira.grails.org/browse/GPGOOGLEVISUALIZATIONAPI-14 -> escaping javascript string quotes due to new security policy in Grails 2.3.x+ to prevent XSS. But in this case it is inherently safe.
Updates plugin dependencies to release
Update version to 0.7.1-SNAPSHOT
Fixes GoogleVisualizationTagLibTests.groovy unit tests
Added Tomcat plugin and upgrade to later Grails version
Part of the Grails upgrade
Added missing file