Add dict key completion in IPCompleter
Additional test coverage for dict key completion
Containers resolve instances.

When a container has an instance traits, the instance's klass is
properly resolved when given as a string.
Add a pure-python version of the Black-Scholes function for comparison with the Cython equivalent
add name back into Cython Magics notebook
First draft of new kernel registry machinery

IPEP 25
Add supporting for making a directory for the native kernel
Better describe functions in kernelspec module
Start refactoring KernelManager to use kernel registry
Miscellaneous fixes to kernelspec system
Expose --kernel arg for selecting kernel on console and qtconsole
Nicer formatting for default kernel files
Allow an arbitrary number of kernel directories to search
Fix writing native kernel spec on Python 2
Rename list_kernel_specs to find_kernel_specs
Remove extra action generation in "All Magics" menu population.

The function that populates "All Magics" and "CLASS magics" menus
used to create two separate QActions: one for the all-menu and one for class
menu. There is no apparent reason for doing that, since single QAction can
happily serve multiple menus and buttons.
Special cased kernel name is 'python', not 'native'
Add mechanism to specify environment variables in kernel spec
allow async output on the most recent request

Keeps track of the most recent request, so async output is still allowed
schedule async flush

allows threadsafe flush from background threads