Shims for deleted (refactored away) files

closes TryGhost#1873.
During file system merge upgrades of new releases, old files are not removed and node's require loads the old file instead of all the new ones in the new directory. The files in this commit act as a delegate for all other dependent scripts. These shim files explicitly require the new index.js.

core/server.js

@@ -0,0 +1,14 @@
+/*
+This file is a shim to accomodate simple file system merge upgrade from 0.3.3 to 0.4.
+During a file system merge upgrade from 0.3.3 to 0.4, the old version of this file will
+persist unless this shim is in place. Problems arise when the stale 0.3.3 version of 
+this file exists as well as the new directory of files bearing the same name in 0.4.
+Node's require defaults to loading the 0.3.3 version causing errors. This file replaces
+the old 0.3.3 version. This allows all dependent modules to continue requiring their
+dependencies the way they always have. See issue 1873 for more information.
+
+https://github.com/TryGhost/Ghost/issues/1873
+*/
+var server = require('./server/index.js');
+
+module.exports = server;

core/server/api.js

@@ -0,0 +1,14 @@
+/*
+This file is a shim to accomodate simple file system merge upgrade from 0.3.3 to 0.4.
+During a file system merge upgrade from 0.3.3 to 0.4, the old version of this file will
+persist unless this shim is in place. Problems arise when the stale 0.3.3 version of 
+this file exists as well as the new directory of files bearing the same name in 0.4.
+Node's require defaults to loading the 0.3.3 version causing errors. This file replaces
+the old 0.3.3 version. This allows all dependent modules to continue requiring their
+dependencies the way they always have. See issue 1873 for more information.
+
+https://github.com/TryGhost/Ghost/issues/1873
+*/
+var api = require('./api/index.js');
+
+module.exports = api;

core/server/middleware.js

@@ -0,0 +1,14 @@
+/*
+This file is a shim to accomodate simple file system merge upgrade from 0.3.3 to 0.4.
+During a file system merge upgrade from 0.3.3 to 0.4, the old version of this file will
+persist unless this shim is in place. Problems arise when the stale 0.3.3 version of 
+this file exists as well as the new directory of files bearing the same name in 0.4.
+Node's require defaults to loading the 0.3.3 version causing errors. This file replaces
+the old 0.3.3 version. This allows all dependent modules to continue requiring their
+dependencies the way they always have. See issue 1873 for more information.
+
+https://github.com/TryGhost/Ghost/issues/1873
+*/
+var middleware = require('./middleware/index.js');
+
+module.exports = middleware;