Replace HiLink command with hi def link
Move iskeyword to ftplugin

iskeyword is a buffer-local option so a user that changes filetypes from
`setf clojure`, then changes to `setf foo` for the same buffer will have
the iskeyword additions from clojure in their foo filetype.

This means that we need to move all the syntax keyword definitions that
have non-word characters to use syntax match
Merge branch 'changes-for-bram'

* changes-for-bram:
  Move iskeyword to ftplugin
  Replace HiLink command with hi def link
Add missing require
Update script timestamps