store-appengine-webapp
org.eclipse.jdt.core.javabuilder
org.eclipse.ui.externaltools.ExternalToolBuilder
full,incremental,
LaunchConfigHandle
<project>/.externalToolBuilders/com.google.appengine.eclipse.core.enhancerbuilder.launch
com.google.gdt.eclipse.core.webAppProjectValidator
com.google.appengine.eclipse.core.enhancerbuilder
com.google.appengine.eclipse.core.projectValidator
org.eclipse.jdt.core.javanature
com.google.gdt.eclipse.core.webAppNature
com.google.appengine.eclipse.core.gaeNature