[Xresources] Use ignore-named as value of tabbed.autohide

This causes tab bar to be hidden even if the tab is named.
[shell] Replace “cd” with “d”

It looks like “cd” is one of my most used commands.  Let's add
“d” alias to save on typing and map “cd” to echo informing of
new binding.
[statuses] Capitalisation fix
[git] Drop “git wc” in favour of “git ll”

“git ll” which is “git log --stat” looks nicer than “git wc”, so
let's drop the latter.
[git] Experiment with one-line “git l”

I have mixed feelings about this one-line format, but maybe
it'll grow on me.