Bump version number
tools: Bring changelog from Fedora cockpit.specwq
bridge: Fix double free in cockpit_channel_ready()

For base64 channels we were freeing the decoded payload twice.

Closes #1515
base: Implement base64 encoding of binary data

This is a surprising omission from the ArrayBuffer and typed array
work. Very odd.

Implementation is a polyfill from MDN, and fixed up.

https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding

Our implementation works with binary data in Array, Uint8Array or
Strings.
base: Implement support for binary message channels

These are created using the 'binary: true' cockpit.channel() flag,
which depending on browser support either becomes 'binary: base64'
encoded or 'binary: raw' when traversing the WebSocket and
web service.

It would have been really nice to define a separate WebSocket
subprocotol like 'cockpit1+binary' which we could have used relay
capabilities to the client. However older browsers like phantomjs
make such a mess of the protocol and protocols argument to the
WebSocket constructor.
base: Implement UTF8 encoding and decoding

We would like to use this with Arrays and not just strings like
decodeURIComponent() do. In addition we would like to stream and
possibly ignore encoding errors. In some browsers TextEncoder
and TextDecoder do some of this, but none of the solutions do
exactly what we need.
docker: A new package for docker stuff
base: More general name for console CSS styles
shell: Give AMD interim module loading its own global

If we hang these off of the shell global, then they start to
conflict with things that are already there.
docker: Add component that shows docker logs or console

And use this component in our main docker container details pages.
In addition document it for use outside of Cockpit.