Move underscore & underscore-tests to deprecated directory

packages/deprecated/underscore-tests/package.js

@@ -2,7 +2,8 @@ Package.describe({
   // These tests can't be directly in the underscore packages since
   // Tinytest depends on underscore
   summary: "Tests for the underscore package",
-  version: '1.0.8'
+  version: '1.0.8',
+  deprecated: true
 });
 
 Package.onTest(function (api) {

packages/deprecated/underscore/package.js

@@ -1,6 +1,7 @@
 Package.describe({
   summary: "Collection of small helpers: _.map, _.each, ...",
-  version: '1.0.10'
+  version: '1.0.10',
+  deprecated: true
 });
 
 Package.onUse(function (api) {