QFJ-2.0-XSD - first cut. Adds fix-dictionary.xsd and JAXB plugin
instruction. XSD now used by code generator mojo, JAXB generated objects
now used to configure DataDictionary. Small corrections to the existing
FIXxx.xml files. Changes to code generator XSLT files - some templates
refactored into imported base file.

Signed-off-by: Stephen Flynn <stephen.flynn@jftechnology.com>