Something
Make selection widget respect order.
Import Tuple traitlet for Selection widget
Fix variable name
Fix readonly lock logic.
Don't magically convert values to a list of tuples.
Fix faulty interact tests
Typo fix
This feature was discussed in #6123, but it doesn't look like anything was ever incorporated into the IPython Notebook.

Here's a brief overview of the changes:

- Display of messages from other clients can be toggled on and off from within a notebook, either using the ``<M-m>e`` keyboard shortcut in the web UI, or through the option in the "Kernel" menu.
- notebook.js controls whether messages are displayed through a callback that is invoked from kernel.js when no callbacks are available for a message.
- The UI displays ``execute_input`` messages originating from an other clients in new cells at the end of the notebook. Output messages (``execute_result`` et al.) will only be displayed if a cell exists with a matching message ID.

Pending design questions:

- Should each ``execute_input`` message cause a new cell to be created?
- Should new cells be placed at the end of the notebook, or elsewhere? If the latter, what criteria should be followed?
Selection test fix
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Changed the display order of rich output in the live notebook to match that of nbconvert.  This makes more sense than the other way around due to the need for notebooks already shared on the web to remain consistant. Conversely local notebooks can simply be edited to match the new order.
Updated terminology to match the console/qtconsole
config settings and documentation more closely.

Unsolicited messages => output from other clients.
Increased notification message display time.
Merge remote-tracking branch 'upstream/master'
add pre/post-save hooks

- `ContentsManager.pre_save_hook` runs on the path and model with content
- `FileContentsManager.post_save_hook` runs on the filesystem path and model without content

- use pre_save_hook for things like stripping output
- use post_save_hook for things like nbconvert --to python
`--script` triggers post_save hook with nbconvert
update `--script` behavior to use `nbconvert --to script`
docstring