Add instructions to commit template.

New users can be irritated by the git status text in their editor.
Let's give them a short help.

Signed-off-by: Martin Waitz <tali@admingilde.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/git-commit.sh b/git-commit.sh
index 6785826..1983d45 100755
--- a/git-commit.sh
+++ b/git-commit.sh
@@ -626,6 +626,9 @@
 if test -z "$no_edit"
 then
 	{
+		echo ""
+		echo "# Please enter the commit message for your changes."
+		echo "# (Comment lines starting with '#' will not be included)"
 		test -z "$only_include_assumed" || echo "$only_include_assumed"
 		run_status
 	} >>"$GIT_DIR"/COMMIT_EDITMSG