* QuickHelp button has been removed in favor of a Help menu item.
* Keyboard shortcuts are now in the menus.
* Numerous fixes to subtle aspects of the wijmenu implementation.

There is not a rename dialog that is available in the File menu and
when you click on the notebook name.

* Added last saved with time/date display.
* Reimplemented save widget status updates.

Fix display of SyntaxError in Python 3, plus various cleanups to exception-handling machinery.

Closes ipython#1225.

This prevents the heartbeat from ever waiting for the GIL, which
could cause erroneous heartbeat failures.

…failures)

per ipython#1127

associated test added and passing

Heartbeat no longer shares the app's Context

Fixes in both the single and parallel kernels, preventing the heartbeat thread from sharing the zmq Context with the rest of the process.  Non-copying sends require grabbing the GIL from the zmq io-thread in order to free memory, which could let Python get in the way of the heartbeat.

Test script and notebook added to examples directory.

closes ipython#1260

When used, this disables database-based actions in the Hub.

Useful for minimizing Hub memory consumption.

set auto_create flag for notebook apps

Fixes first use of bundled profiles when used with the notebook (e.g. ipython --profile=sympy).

use self.kernel_manager_class in qtconsoleapp

Subclasses of QtConsoleApp can now override kernel_manager_class with their own version.

allow Reference as callable in map/apply

This allows behaviors like:

    rf = parallel.Reference('f')
    ar = view.map(rf, *sequences)

where the function 'f' is defined on the engines, and can even be different.

add `--nodb` option for non-recording Hub

This allows simple use cases to avoid needing to call `purge_results` to prevent memory growth of the Hub.

Fix minor typo in history_console_widget.py