move routes into modules (readonly, export, import)

I moved the routes for requests that handle readonly, export or import
requests into seperate modules.

node/routes/import.js

@@ -0,0 +1,41 @@
+var ERR = require("async-stacktrace");
+
+module.exports = function(app)
+{
+  //TODO put this into module
+  //checks for padAccess
+  function hasPadAccess(req, res, callback)
+  {
+    app.securityManager.checkAccess(req.params.pad, req.cookies.sessionid, req.cookies.token, req.cookies.password, function(err, accessObj)
+    {
+      if(ERR(err, callback)) return;
+
+      //there is access, continue
+      if(accessObj.accessStatus == "grant")
+      {
+        callback();
+      }
+      //no access
+      else
+      {
+        res.send("403 - Can't touch this", 403);
+      }
+    });
+  }
+
+  //handle import requests
+  app.post('/p/:pad/import', function(req, res, next)
+  {
+    //if abiword is disabled, skip handling this request
+    if(app.settings.abiword == null)
+    {
+      next();
+      return;
+    }
+
+    hasPadAccess(req, res, function()
+    {
+      app.importHandler.doImport(req, res, req.params.pad);
+    });
+  });
+};