XMCDA 2.1.0 release notes

• Added a matrix of alternatives x criteria under the tag <alternativesCriteriaValues/>.
• Added a <variable/> tag in <criteriaLinearConstraints/>, <attributesLinearConstraints/> and <categoriesLinearConstraints/>, and corrected missing <value/> and <values/> for all the constraints.
• In the standard XSL, taking into account of the <values/> tag in the <pair> tag.