Add support for explicit fromnick in protocol messages where availiable

This can replace the prefix-nick-guessing where available.
Support host-rendered time

If available, display the time as rendered by the host instead of own
calculation
[teddy default] modify theme to use flex boxing, better fits original display
[teddy default] theme: make more room for buffers on desktop layout
[teddy default] no coloured hilight
[teddy default] enable readline bindings by default
[teddy default] make light theme default
[teddy default] change firefox webapp manifest, glowing-bear is running in /
[teddy default] load teddy javascript
[teddy default] make teddy default protocol
[teddy default] rewrite index.html and remove mentions of weechat
[teddy default] add teddy protocol module
[teddy default] theme: retain timestamp colour