Work without meta

[srush]

Traceback (most recent call last):
File "server.py", line 321, in
create_data_handlers(args.dir)
File "server.py", line 307, in create_data_handlers
data_handlers[p_dir] = LSTMDataHandler(directory=p_dir, config=config)
File "/home/ubuntu/Projects/LSTMVis/lstmdata/data_handler.py", line 79, in init
if self.config['meta']:
KeyError: 'meta'