Fixed some name errors in marine labels and airports

I think I was doing the right thing to regenerate only the relevant zip files, but possibly I'm messing that stuff up. The main changes that should be merged are in https://github.com/stamen/natural-earth-vector/commit/4e3c00cf738f794e64731840fe401377246915d5 and https://github.com/stamen/natural-earth-vector/commit/c95f84a8264c5723c27e2697e2b6bda15a607849