jape-mode recipe

The original major mode for JAPE files doesn't appear to have been
updated since 2005 is very feature incomplete. The original version was
also GPL licensed, but I can't find a copy of it online anymore. This is
an update to that original jape-mode that is more modern and under
active development.
Merge pull request #1968 from tanzoniteblack/jape-mode

jape-mode recipe