Re: updated emacs configuration

Updated files with changes:

- adjusted fill-column to 78, per Noah
- added c-file-style, per Andrew
- support both "postgresql" and "postgres" directory names
- use defun instead of lambda, per Dimitri
- put Perl configuration back into emacs.samples, for Tom

I also added configuration of c-auto-align-backslashes as well as label
and statement-case-open to c-offsets-alist. With those changes, the
result of indent-region is now very very close to pgindent, with the
main exception of the end-of-line de-indenting that pgindent does, which
nobody likes anyway.