add 'all' extras

which should get everything
add pandoc to install docs
RST capitalization fix
s/ConfigurableTransformer/Transformer
s/Test_/Test
Fix, ansi2latex style-less code support
Allow ansi2latex function to recognize ansi codes without styles
Fix ansi2latex color remainer of string.
Exclude nbconvert testing config files from iptest interpretation.
Add nbconvert dependencies to TravisCI config
remove special-case in get_home_dir for frozen dists

closes #2702
docstring typo
Merge pull request #3670 from minrk/ipexec-again

use Popen command list for ipexec
update tests for frozen dists
Merge pull request #3674 from minrk/contributing

add CONTRIBUTING.md
Travis, test without exclusion...
Removed double space
Add __init__.py files for files directories
Re-enable files directory exclusion.
Removed uneccessary __ini__.py files
Copy ipynb example files need for nbconvert tests