Merge pull request
#3814 from minrk/no-complete...
Merge pull request
#3814 from minrk/no-complete
add `ConsoleWidget.execute_on_complete_input` flag
disables input-parsing in the QtConsole, which is inappropriate for non-Python kernels.
Disabling execute_on_complete_input requires shift-enter to execute, just like the Notebook.
Not sure if we want this for 1.0 or not. It's pretty trivial, but it is technically a new feature.
