Add .editorconfig to maintain a more consistent coding style

This does not set anything yet.

See http://editorconfig.org/ for more information.

.editorconfig

@@ -0,0 +1,9 @@
+# .editorconfig -- settings for consistent coding style conventions
+# Copyright (C) 2017  Olaf Meeuwissen
+#
+# License: GPL-3.0+
+
+# Your editor may need a plugin for this configuration to take effect.
+# See http://editorconfig.org/#download for details.
+
+root = true                     ; look no further

Makefile.am

@@ -13,6 +13,7 @@ dist_doc_DATA = AUTHORS ChangeLog COPYING LICENSE NEWS PROBLEMS PROJECTS \
  README.solaris README.unixware2 README.unixware7 README.windows \
  README.zeta
 EXTRA_DIST = $(PACKAGE).lsm
+EXTRA_DIST += .editorconfig
 
 #
 # Keep the .gitignore files sorted, and use this target to do it.