[REL] Preparing 10.6 release

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[REL] Preparing 10.6 release (more)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/10.x@51106 b456876b-0849-0410-b77d-98878d47e9d5
[REL] Update README file for 10.6

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/10.x@51108 b456876b-0849-0410-b77d-98878d47e9d5
[REL] Update language.php files for 10.6

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/10.x@51109 b456876b-0849-0410-b77d-98878d47e9d5
[REL] Update changelog.txt for 10.6

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[REL] Update copyright.txt for 10.6

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[REL] SecDB for 10.6

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/10.x@51112 b456876b-0849-0410-b77d-98878d47e9d5
[REL] Closing release 10.6

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