flupe's vim8 terminal support - rebased onto master

[mitchmindtree]

This rebases @flupe's work on implementing Vim 8 terminal support (#42) onto master.

Also removes mention of the not-yet-implemented :TidalStart command. I'll open separate issues for these.

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I'm not yet savvy enough with VimL to review the rest of the changes here properly just yet, and I'm yet to actually test them locally :smiling_face_with_tear: Will report back once I get the chance.

@munshkr are you happy to remove tmux tiling support altogether in favour of native terminal support? I think it does make a lot of sense to encourage vim's native terminal instead as it skips the need for one extra 3rd party tool. I think it also avoids issues related to opening tmux inside of another instance of tmux (I'm almost always already inside a tmux pane :smile: ). Perhaps we can provide some handy tmux scripts/config under a separate tidalcycles repo?

[munshkr]

Hi @mitchmindtree thank for you reviving this! I think it makes a lot of sense to make the terminal mode the default and leave tmux as optional, for the reasons you mention. I wouldn't remove it completely, but it should definitely be optional, and we could provide instructions on how to enable it.

I'll review it and come back later today.

[mitchmindtree]

I have a follow-up commit here based on these changes that allows for specifying a custom BootTidal.hs path via g:boot_tidal, but I'll leave it for a follow-up PR to keep this one as small as possible.

[mitchmindtree]

Hey there @munshkr, would you be interested in some help with maintaining the plugin? I'd be happy to assist :bow:

[mitchmindtree]

Thanks again for adding me as a collaborator @munshkr :pray: Going to land this and start opening some new PRs for some pending work I have downstream.