We have differentiated views of new (italic) and unread (underline, and
a bit of highlight on the author) messages.
Additionally the indicator highlighting works better with the rest of
the colors, and we have a better paperclip icon icon for attachments.
Some macros ceased to work. I am not sure if it was because they
were deprecated and stopped working with a new version or they
never fully worked in the first place. Either way, now it is
running again.
Changed some colors, some keymaps and made it more flexible for new mail
account setups. Also removed most of the static gmail-related account
stuff since I don't need this in my public repo.