Upload image fails if there is no uploaded_images folder

[brittainhard]

Traceback:

Traceback (most recent call last):
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask_restful/__init__.py", line 262, in error_router
    return original_handler(e)
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask_restful/__init__.py", line 262, in error_router
    return original_handler(e)
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Users/brittainchristopherhard/anaconda/envs/memex/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/brittainchristopherhard/Documents/memex-explorer/app/views.py", line 611, in upload
    image_names = get_uploaded_image_names()
  File "/Users/brittainchristopherhard/Documents/memex-explorer/app/db_api.py", line 236, in get_uploaded_image_names
    ret_list = os.listdir(upload_dir)
OSError: [Errno 2] No such file or directory: '/Users/brittainchristopherhard/Documents/memex-explorer/app/resources/image_space/uploaded_images/'

[chdoig]

Fixed in #213