xsd-fu: Add --debug option to replace debug command
xsd-fu: Pass model, options, language and debug variables to templates
xsd-fu: Java EnumHandler template uses enum package
xsd-fu: Add debug conditionals to Java Pojo template
xsd-fu: Java templates print ignore statements in debug mode
xsd-fu: C++ templates print ignore statements in debug mode
xsd-fu: Use more pythonic boolean tests
xsd-fu: Improve dry run mode

Dry run mode now performs all the normal template processing,
except for writing output.