Added global jaxb binding to generate simple binding

[pranavbhalla89]

1. Added global jaxb binding to generate simple binding instead of element based ones http://stackoverflow.com/questions/12508741/jaxb-generating-jaxbelementstring-instead-of-string

@damienbeaufils Found your article really helpful, did some add-ons for my project, please merge if it looks useful

[damienbeaufils]

Thank you! I often update bindings to have simple elements instead of JAXB elements, I forgot to do this here!