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
cleanup pylab deprecation

extra substitution was unnecessary because argparse supports passing args with spaces
don't recommend `ipython notebook --matplotlib`
Deleted empty spaces.
add output flag to nbconvert

fixes 3799
apply the same long-timeout logic to kernel tests

as previous commit for test_console
Merge pull request #3812 from minrk/start_ip

Describe differences between start_ipython and embed

in what's new and the embedding section

closes #3726
Added webbroser to auto open the slideshow.
don't set target on internal markdown links

simple in-page anchor-nav shouldn't open a new tab.
Merge pull request #4 from minrk/pr/3816

Finish up PR #3816
Made open_in_browser configurable.
Merge pull request #3816 from Carreau/depylab

s/pylab/matplotlib in docs

Remove most remaining mentions of `--pylab` in the docs.
Merge pull request #3824 from minrk/heading-link-local

don't set target on internal markdown links

simple in-page anchor navs shouldn't open a new tab.
fix more tests that fail if pandoc not installed