Schema for RESTful Service Description Language (RSDL)

Schema for RESTful Service Description Language (RSDL), in RELAX-NG Compact Syntax.
rsdl2html.xsl - a stylesheet to convert RSDL to HTML.
Added Balisage paper.
Examples of RSDL descriptions.
Update README.md
Update README.md
Consistent use of copyright notices.
Merge branch 'master' of https://github.com/jonathanrobie/restful-service-description-language
Fixed copyright notice in PDF.
Update README.md
Renamed 'balisage' directory to 'docs'.
Merge branch 'master' of https://github.com/jonathanrobie/restful-service-description-language
Added documentation modules.
Restructured directories.
Moved Apache license down - to avoid syntax error.
Updated to current schema.
Merge branch 'master' of https://github.com/jonathanrobie/restful-service-description-language