Add Plone 4.3 compatibility, drop Plone <= 4.0
Do not customize KSS for Plone 4.3.
Remove folder contents customizations.
Some pep8 love.
Support newest ftw.contentmenu version by moving the menu viewlet manager below the title.
Merge pull request #19 from 4teamwork/jone-plone-4.3

Plone 4.3 compatibility