rework some bundle commenting for better highlighting

It just makes life easier, ok? :)
add plugins to assist with conflict resolution *not* using vimdiff
disown our fork to prevent zombies

...'cause a bunch of zombies running around the process table, following your
vim process around is just kinda scary.

Trying to set up a persistent $SIG{CHLD} handler does NOT go over well (or
work), either.
perl_fork.vim: whitespace, other formatting bits
add local ftplugin/perl.vim

Just to turn on spell-check for our POD.

...for now.