ipython/ipython — pull request #6876 by minrk (2014-11-07 00:02:07+00:00)
Title: Add exponential falloff to kernel reconnect

- reconnect tries after 2, 4, 8,,...,64 seconds
- gives up after last attempt, setting new `Connection lost` notification
- clicking `Connection lost` triggers reconnect
- add `Reconnect` to Kernel menu