Add tmux command arg options

[ferreum]

This adds options to modify the tmux commands.

Defaults:

let g:tmux_complete_list_args = '-a'
Additional args for tmux list-panes.

let g:tmux_complete_capture_args = '-J'
Additional args for tmux capture-pane.

Examples:

let g:tmux_complete_list_args = '-s'
Only capture panes of active session.

let g:tmux_complete_list_args = ''
Only capture panes of active window.

let g:tmux_complete_capture_args = '-J -S -1024'
Join wrapped words and capture up to 1024 lines of scrollback.

[wellle]

That looks like a good solution.

It even supports #14 as you can add -E and -S flags to g:tmux_complete_capture_args now.

Thank you!

[wellle]

Alright, I merged #16, #17 and #18. Thank you for your contributions! 👍