Adds and/or helper methods to QueryClauseType (#12)

Signed-off-by: Sean Sundberg <[email protected]>

src/main/java/com/ibm/openpages/support/util/query/QueryClauseType.java

@@ -22,4 +22,12 @@ public QueryClause where(ResultValue field, Operation operation, Object value) {
         return new SimpleQueryClause(type, field, operation, value);
     }
 
+    public QueryClause and() {
+        return new AndQueryClause(type);
+    }
+
+    public QueryClause or() {
+        return new OrQueryClause(type);
+    }
+
 }