Maintains github/components overrides

After discussion with the maintainers it was determined that
leaving the package-overrides for github/components/jquery and
jqueryui for posterity was useful.  Even if the liklihood
is low that the non-npm version of these dependencies is used
it's best that we don't break the github/components version.

package-overrides/github/components/jquery@2.0.3.json

@@ -0,0 +1,5 @@
+{
+  "main": "jquery",
+  "files": ["jquery.js"],
+  "format": "global"
+}

package-overrides/github/components/jquery@2.1.0.json

@@ -0,0 +1,3 @@
+{
+  "main": "jquery"
+}

package-overrides/github/components/jqueryui@1.11.3.json

@@ -0,0 +1,7 @@
+{
+    "main": "jquery-ui.js",
+    "registry": "jspm",
+    "dependencies": {
+        "jquery": "*"
+    }
+}