uds org.python.pydev.PyDevBuilder org.eclipse.ui.externaltools.ExternalToolBuilder full,incremental, LaunchConfigHandle <project>/.externalToolBuilders/org.eclipse.wst.validation.validationbuilder.launch org.python.pydev.django.djangoNature org.python.pydev.pythonNature org.eclipse.wst.jsdt.core.jsNature