First attemp at colouring Changelog files.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4697 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2014-03-30  Benno Schulenberg  <bensberg@justemail.net>
+	* doc/syntax/changelog.nanorc: New file, first attemp at colouring
+	Changelog files.
+
 2014-03-30  Mike Frysinger  <vapier@gentoo.org>
 	* doc/Makefile.am, doc/man/Makefile.am, doc/man/fr/Makefile.am -
 	The build already provides a standard htmldir for installing html

doc/syntax/changelog.nanorc

+## Colouring for Changelogs.
+##
+syntax "changelog" "^Change[Ll]og"
+
+# Author lines.
+color green "^(19|20).*$"
+# Dates.
+color red "^(19|20)[-0123456789]*"
+# Email addresses.
+color yellow "<[^>]*@[^>]*>"
+
+# Changed files.
+color magenta "[[:space:]]\*[[:space:]].*:"
+
+# Probable variables, for variety.
+color brightred "\<[A-Z_][0-9A-Z_]+\>" 
+
+# Trailing whitespace.
+color ,green "[[:space:]]+$"