use correct field for revised date
icons are no longer question marks
Merge pull request #420 from Connexions/workspace-icons

Workspace icons are no longer question marks
parse the response from the POST
Remove "Miscellaneous" from workspace.

Fixes #423
Merge pull request #425 from Connexions/editing-new-books

EDITING: new books don't show up as subcollections in the workspace
Merge pull request #426 from Connexions/workspace-misc

EDITING: Remove "Miscellaneous" from workspace.
Merge branch 'editing' into editing-workspace-revised-date
add derived status if content was derived
set the background of draft content
Merge pull request #430 from Connexions/workspace-derived

WIP Workspace add derived status if content was derived
Remove Sign Up link
allow editing below existing content
drafts edit by default, replace browse with preview
implement revert by refetching
Fix saving
Fix options
Merge pull request #435 from Connexions/revert-button

implement revert by refetching
Merge pull request #432 from Connexions/sign-up-link

Remove Sign Up link
Merge pull request #433 from Connexions/edit-below-existing-content

Edit below existing content