Checking in changes prior to tagging of version 0.18.

Changelog diff is:

diff --git a/Changes b/Changes
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+{{$NEXT}}
+
+0.18 2014-11-26T12:58:30Z
+    - updated MichishigeSayumi.pm along with her graduation from Morning Musume on Nov 26th 2014.
+
 0.17 2014-10-06T12:16:25Z
     - added HagaAkane.pm MakinoMaria.pm NonakaMiki.pm OgataHaruna.pm who joined into Morning Musume as 12 class.