Print View has been removed

Closes #3754, #3778
added @Carreau's suggestion
Describe differences between start_ipython and embed

in what's new and the embedding section

closes #3726
add `ConsoleWidget.check_complete` flag

disables input-parsing in the QtConsole,
which is inappropriate for non-Python kernels.

Disabling check_complete forces shift-enter to execute, just like the Notebook.
execute_on_complete_input

better name for check_complete
pylab-> matplotlib
remove some other occurences of pylab
remove again a few other occurences
relax timeouts in Terminal console check for kernel

and use kernel_info request to check instead of executions
increase timeouts in test_console

should decrease false failures on slow VMs (travis)
Make it clear that 1.0 is not released yet
Merge pull request #3820 from takluyver/whatsnew-prerelease

Make it clear that 1.0 is not released yet
make kernel_timeout configurable in terminal console
Merge pull request #3805 from ivanov/fix-3778

Print View has been removed

Closes #3754, #3778
Initial refactoring of htmlnotebook.txt into 3 parts.

Renamed htmlnotebook.txt to notebook.txt. 79-char width hard wrapping imposed. Rearrangment of order and level within notebook.txt. Almost no text modified.
txt/rst in notebook docs
fix a few markup issues and inaccuracies
Merge Pull Request #3772

from dpsanders/notebook_docs_refactored

closes #3772
single timeout value for pexepect in test_console
cleanup a few remaining mentions of pylab in docs