Change log for data-access protocol

Changes between v11.05 and v11.12

The details of VOSI capabilities and registration were clarified. The XML schema with namespace http://www.vamdc.org/xml/VAMDC-TAP/v1.0 is now explicitly in force for the VAMDC-TAP registration. This formalizes the approach used in the 11.09 system.

Changes between v11.12 and v12.07

• Added mention of Last-Modified HTTP header.
• Replaced VSS1 mention with VSS2.
• Changed Mime-Type of XSAMS to be returned as application/x-xsams+xml
• Added Quality Assurance checklist chapter
• Explained VAMDC-TAP registration capabilities elements