Show the tile type on the compose tab:

This shows the type of a tile (Basic Tile, Collection Tile, etc...) in the
top right of the tile on the compose tab.  This makes it easier for the user
to know how they can add content -- especially if the user does not have
enough permission to view the layout tab.
Adds failing tests for #348
Hides 'please add..' text in all views but the compose view. Fixes #348
Updates changelog.
Show the tile type name in the top-center of a tile, instead of the top-right.
Merge pull request #361 from warpr/show-tile-type-on-compose-tab

Show the tile type on the compose tab:
Merge pull request #363 from collective/issue_348

Hides 'please add..' text in all views but the compose view.
Update changelog
Fix typo in docstring
Update changelog with enhanced description
Expand warning message on changelog trying to avoid issues
Remove unused link
Gets the carousel test working again. Fixes #333
Updates changelog.
Merge pull request #366 from collective/issue_333

Gets the carousel test working again. Fixes #333.