pass req to the getFileName and getDirectory

[titovanton]

It is very small patch:

-  getDirectory: function (fileInfo, formData) {
+  getDirectory: function (req, fileInfo, formData) {
-  getFileName: function (fileInfo, formData) {
+  getFileName: function (req, fileInfo, formData) {

This parameter let me handle re.query inside getDirectory, where i can pass the HTTP GET parameter to manipulate of subdirectory path from the client.

[titovanton]

Ok, I found the bug...
First of all, I want to say thank you for ur upload-server. It works. But u do not follow conventions :/ , so ur code is very hard to read(especially for noobs like me).
Also, always use path.join instead concatination(that's about ur bug):

-    var destinationFile = currentFolder + newFileName;
+    var destinationFile = path.join(currentFolder, newFileName);

[titovanton]

so, the result of ur concatination is:

/path/tofilename

instead:

/path/to/filename

there r alot of concatinations in ur code more, but it seems it works :) It would be awesome to refactor ur code and cover with tests...