[REF] Replace table layout with divs, add Bootstrap thumbnail class to topic image, etc. Work in progress.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49551 b456876b-0849-0410-b77d-98878d47e9d5
[CSS]Adding design tag

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49552 b456876b-0849-0410-b77d-98878d47e9d5
[CSS]Adding design tag

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49553 b456876b-0849-0410-b77d-98878d47e9d5
[ENH]text clarification

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@49554 b456876b-0849-0410-b77d-98878d47e9d5