added README and changed cadc-vodml source to 1.8

cadc-vodml/README.md

@@ -0,0 +1,18 @@
+# cadc-vodml 
+
+Basic VO-DML/XML validator. VO-DML/XML is a document format to describe data models and includes
+both <a href="https://www.w3.org/XML/Schema">XML Schema</a> and <a href="http://schematron.com/">ISO Schematron</a>
+validation. This module implements validation of such a data model description using both the VO-DML schema and
+schematron constraints.
+
+Future goals:
+- the VOModelReader currently validates VO-DML/XML documents but just returns a JDOM Document; the intent is to
+implement or re-use a basic set of domain classes ansd return, for example, an instance of DataModel.
+
+The VOModelReader can be easily used in unit tests to validate a VO-DML document before running further processes 
+such as generating UML diagrams or HTML documentation. 
+
+The included command-line wrapper is pretty basic but functional.
+
+Note: one of the library dependencies (ph-schematron) requires Java 8.
+

cadc-vodml/build.gradle

@@ -11,7 +11,7 @@ repositories {
     mavenLocal()
 }
 
-sourceCompatibility = 1.7
+sourceCompatibility = 1.8
 
 group = 'org.opencadc'