[REF] A little Bootstrappifying.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@51188 b456876b-0849-0410-b77d-98878d47e9d5
[REF] Replace hard-coded colors in tiki.less with Bootstrap variables.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@51189 b456876b-0849-0410-b77d-98878d47e9d5