gwtorganise
org.eclipse.jdt.core.javabuilder
com.google.gwt.eclipse.core.gwtProjectValidator
com.google.appengine.eclipse.core.enhancerbuilder
com.google.appengine.eclipse.core.projectValidator
com.google.gdt.eclipse.core.webAppProjectValidator
org.eclipse.ui.externaltools.ExternalToolBuilder
full,incremental,
LaunchConfigHandle
<project>/.externalToolBuilders/New_Builder.launch
org.eclipse.jdt.core.javanature
com.google.appengine.eclipse.core.gaeNature
com.google.gwt.eclipse.core.gwtNature
com.google.gdt.eclipse.core.webAppNature