JiBX: Schema generation

### Generating a schema from binding and code

Schema generation from a binding and code uses the `org.jibx.schema.generator.SchemaGen` class. The implementation has been heavily influenced by the needs of BindGen, and may not be usable with bindings constucted by hand. If you want to give it a try, run SchemaGen directly from a console and you'll receive a list of command line parameters. Future releases in the 1.2 series will improve SchemaGen handling of unusual binding constructs, and will also include further documentation.