[nitrogen] Retire nitrogen - no maintainer

[Bill Nottingham]

commit 4b09bbbded03140d2d351057fd659b6991966b04
Author: Bill Nottingham <notting at redhat.com>
Date:   Tue Mar 12 00:12:49 2013 -0400

    Retire nitrogen - no maintainer

 dead.package     |    1 +
 nitrogen.desktop |   10 -----
 nitrogen.spec    |  112 ------------------------------------------------------
 sources          |    1 -
 4 files changed, 1 insertions(+), 123 deletions(-)
---
diff --git a/dead.package b/dead.package
new file mode 100644
index 0000000..5e32ab9
--- /dev/null
+++ b/dead.package
@@ -0,0 +1 @@
+This package was retired on 2013-03-11 due to a lack of a willing Fedora maintainer.