Update messages_zhtw.yml to latest version

Those [Authme] tags are pretty unnecessary to add while the others didn't have it displayed.
Merge pull request #74 from lifehome/patch-1

Update messages_zhtw.yml to latest version
Update 3.1.1

//Changes 3.1.1://
* Do /login correctly in the correct thread
* Add a way to force some commands after /login
* Try a fix for bungeecord , let's see ...
* Fix Logout command ( pos + inventory )
* Fix PHPBB support + random salt
* Add a bypass antibot perm : authme.bypassantibot
* Translation file will automatically update now
Merge remote-tracking branch 'upstream/master'