Add Syntastic/perl-mauke, remove csv, move php.vim

Syntastic should help detect problems before exiting vim and trying to
run scripts. Hooray! For now, due to a couple problems with installed
library locations, I've made it so that PHP will not be actively
checked; I should fix this and update the file eventually.

The CSV plugin wasn't behaving properly, and so it's gone. It's possible
the wrong CSV plugin was loaded, but I work with CSV rarely enough that
it wasn't currently worth the trouble to fix it. I'd already commented
it out, but now it's just gone.

I've also re-enabled the perl-mauke updated syntax bundle. I had it for
a while, but had disabled it while I was trying to figure out whether it
was the cause of issues with lack of HEREDOC indenting. It was not, and
unfortunately I haven't figured out what the problem really is. However,
in the meantime, best not to throw the baby out with the bathwater.

I also fixed indentation in one random line. That was very important.
Add `reshell` binary for reloading configuration

Rather than think about which shell I'm using for running the related rc
file again after updates, I'd rather just remember one command, which
also doesn't have any special characters. This command answers ALL my
prayers.

I have also included a helpful note after a successful update is run to
remind me to do this.