Added telnet option ECHO, so that server can request no local echo on client. Related with feature request #540
Fixed keyword name and arguments for the telnet option ECHO.
Fixed a bug in the lockhandler error handling. Resolves #564.
Cleaned up the connection screen example a little and added utf-8 encoding token at the top.
Changed at_cmdset_get() hook to at_cmdset_get(**kwargs). This allows for the possibility to control dynamic generation of cmdsets, for example to force Exit cmdsets to be rebuilt. The aliasing command now uses this. Resolves #563.
Changed the examine command to add #dbref information to exits, characters and contents. Resolves #567.
Updated the requirements.txt file to latest dependency versions