Add Zurb Foundation Themes

[macagua]

Add the following Zurb Foundation Themes:

• https://github.com/toutpt/collective.js.foundation
• https://github.com/toutpt/plonetheme.foundation
• https://github.com/seantis/seantis.web
• https://github.com/OneGov/onegov.foundation
• https://github.com/OneGov/plonetheme.onegov
• https://github.com/OneGov/plonetheme.onegovbear
• https://github.com/lkosubek/htwkimn.theme

[macagua]

Related Issues #69, #71

[macagua]

plonetheme.foundation don't work still on Plone 4.3.x version toutpt/plonetheme.foundation#3