Item12913: Fix some MANIFEST issues

Remove Config.spec from TopicUserMapping
The file was empty, but check_manifest flags it as a file missing from
the manifest.

SubscribePlugin - logo.gif is missing from the MANIFEST.  Also files in
data and pub need write permission or will cause error in configure
checks.

RCSStoreContrib - MANIFEST is missing permissions on one file.

FamFamFamContrib - The icons need permissions

git-svn-id: http://svn.foswiki.org/trunk/RCSStoreContrib@17688 0b4bb1d4-4e5a-0410-9cc4-b2b747904278