Emacs-uncrustify updates

Emacs-uncrustify emacs extension had some small but cool contributions by Gordon Read (thanks, man!).

It has now a customization group with variables holding:

• path to uncrustify’s configuration file
• arguments to be passed to uncrustify
• boolean flaging if uncrustify should be applyed on a buffer on save

We also have two different functions, now. The uncrustify one does the same — uncrustifies a region. There’s also uncrustify-buffer, now, as a shortcut for applying it to the whole buffer.

Finally, a c-mode-common-hook was added, which will apply uncrustify on the buffer if and only if that third variable is set.

Enjoy.