how to get ctags completion?

[zhaocai]

Refer to #70

It is not working after I directly modify the default_settings.json file and set "collect_identifiers_from_tags_files": 1. Then I read the ycmd code and find identifier_completer.py:

def OnFileReadyToParse( self, request_data ):
    self.AddBufferIdentifiers( request_data )
    if 'tag_files' in request_data:
      self.AddIdentifiersFromTagFiles( request_data[ 'tag_files' ] )

So, I think from the client side, atom-youcompleteme need to pass tags_files in request_data to ycmd.

Any further suggestion to make ctags completion work?