.gitignore: Ignore nothing in ~/.mutt
.mutt: Highlight unread messages as blue
.gnupg: Stop tracking pubring

There's nothing sensitive in the current pubring, but remove it to
eliminate the potential for sensitive leaks.
.tmuxinator/mutt: Open manual in new window
.gitignore: Ignore editor crumbs
vim-vtd: Add submodule
vim-maktable: Update submodule
vim-glaive: Add submodule