sfactor fails because it doesn't set classpath fully

1. Install XMLBeans v2 beta
2. Try to run sfactor against a schema.
3. Note the following in the console:
Using output directory 'out'
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/stream/XMLStreamException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2365)
at java.lang.Class.getMethod0(Class.java:2611)
at java.lang.Class.getMethod(Class.java:1579)
at org.apache.xmlbeans.XmlBeans.buildMethod(XmlBeans.java:174)
at org.apache.xmlbeans.XmlBeans.buildNodeMethod(XmlBeans.java:195)
at org.apache.xmlbeans.XmlBeans.buildNodeToCursorMethod(XmlBeans.java:232)
at org.apache.xmlbeans.XmlBeans.<clinit>(XmlBeans.java:131)
at org.apache.xmlbeans.impl.xb.xsdschema.SchemaDocument$Factory.parse(SchemaDocument.java:764)
at org.apache.xmlbeans.impl.tool.FactorImports.main(FactorImports.java:145)

4. Open bin/sfactor or bin/sfactor.cmd and note that classpath is set to include only xbean.jar. Should probably also include jsr173_api.jar.