~kota/black-pastel

strip out unneeded groups
color tweaks and new supported vim plugins
update image again
update screenshot
brighten comment color

Been programming out at the beach a lot more recently and felt like the
comment color didn't have enough contrast when I was in the sun. I've
made it slightly brighter and I think it looks better now.
change base16 to have a black background
add default base16 dark