Add CMS placeholders for aside, footer, etc.

[Peter Bittner]

Synopsis

Currently, only in the central "content" area it is possible to add content using CMS functionality. It must also be possible to add content to the sidebar ("aside" tag), and the footer. Optionally, also header and navigation or menu ("nav" tag) could provide placeholders.

Technical Notes

• Static placeholders (e.g. for the footer) are only supported in django CMS 3!
• Discussions: StackOverflow, Google Groups

[Peter Bittner]

Tracked with Mingle card #6.