Tweaks to file_server initialisation

We are setting a sensible default for the storage folder and loading
that automatically, this way we avoid having a compulsory config file.

attract/application/file_server.py

@@ -3,7 +3,8 @@ import os
 from flask import Blueprint
 from flask import request
 
-import config
+from application import app
+
 
 file_server = Blueprint('file_server', __name__,
                         template_folder='templates',
@@ -22,10 +23,10 @@ def index(file_name=None):
     #POST file
     file_name = request.form['name']
     folder_name = file_name[:2]
-    file_folder_path = os.path.join(config.Development.FILE_STORAGE,
+    file_folder_path = os.path.join(app.config['FILE_STORAGE'],
                                     folder_name)
     if not os.path.exists(file_folder_path):
-                    os.mkdir(file_folder_path)
+        os.mkdir(file_folder_path)
     file_path = os.path.join(file_folder_path, file_name)
     request.files['data'].save(file_path)