Expand list of files ignored by Git

[pyrmont]

Update the list of files ignored to include /vendor and *.swp.

[jneen]

Fine by me - but I usually put *.sw[a-z] in my own global gitignore.

[jneen]

also, you can tell vim to put those swapfiles somehwere else entirely. my approach:

set undodir=~/.cache/vim/undo//
set directory=~/.cache/vim/swap//
set backupdir=~/.cache/vim/backup//

[pyrmont]

@jneen Thanks—I've updated my global gitignore accordingly :) Do you mind if I still merge it in (mostly for the vendor/ directory exclusion)?