Better meta-schema, fix typo.

Properly specify the meta-schema, which for some reason was only
a description.  We don't put descriptions in the meta-schema anymore,
but we do put type information.  Not sure what happened there.

Author: handrews

jsonschema-hyperschema.xml

@@ -535,7 +535,7 @@
                     <section title="Missing values" anchor="missingValues">
                         <t>
                             Sometimes, the appropriate values will not be available.  In many
-                            cases, the URI Template behavior of simply removing varibles that
+                            cases, the URI Template behavior of simply removing variables that
                             do not have a value will be appropriate.  An example of this is
                             optional query parameters, the presence or absence of which does
                             not change the nature of the link relation type.

links.json

@@ -25,7 +25,10 @@
             ]
         },
         "hrefRequired": {
-            "description": "an array of URI template variables names from \"href\" which must be filled out with some value, either from the instance or user input"
+            "type": "array",
+            "items": {
+                "type": "string"
+            }
         },
         "rel": {
             "type": "string"