replaced gorilla with melody

[NikkyAI]

also added websocat command to the matterbridge.tml.sample

[NikkyAI]

this does NOT send backlog to the websockets on connection
I plan to add that in a followup PR

api/stream still consumes messages from the buffer
and accessing api/messages will clear the message buffer
... these are things i will modify in followup PRs

websockets do not consume messages as messages are directly sent to the melody router

[42wim]

some small changes and it can be merged

[codeclimate]

Code Climate has analyzed commit e17b7c9 and detected 1 issue on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	1

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[NikkyAI]

rebased on master and rnamed the requested bits
(also one occurrence where i forgot to return in case of error)