Add per-directory local Emacs variables.

The idea is to enforce the coding style for Emacs users.

.dir-locals.el

+((nil .
+      ((c-file-style . "gnu")
+       (indent-tabs-mode . nil)
+       (fill-column . 79)))
+ (makefile-mode . ((indent-tabs-mode . t)))
+ (matlab-mode . ((matlab-indent-level . 4)
+                 (matlab-indent-function-body . nil))))

Makefile.am

@@ -30,7 +30,8 @@ EXTRA_DIST = \
 	windows/README.txt \
 	osx \
 	examples \
-	scripts
+	scripts \
+	.dir-locals.el
 
 dist-hook:
 	rm -rf `find $(distdir)/matlab $(distdir)/examples -name *~`