Merge branch 'issue22' of https://github.com/Antares42/json-schema into format

Author: erosb

tests/src/test/resources/org/everit/json/schema/issues/issue22/schema.json

@@ -0,0 +1,10 @@
+{
+    "type":"object",
+    "$schema":"http://json-schema.org/draft-04/schema#",
+    "properties":{
+        "date":{
+            "type":"string",
+            "format":"date-time"
+        }
+    }
+}

tests/src/test/resources/org/everit/json/schema/issues/issue22/subject-invalid.json

@@ -0,0 +1,3 @@
+{
+	"date":""
+}