add a signal on article writing
Use the actively maintained typogrify-web package

The Typogrify library is no longer actively maintained by the
original author. These changes switch Pelican over to a new fork that
will receive more consistent updates going forward.
Update Travis config with new Typogrify package
Merge pull request #1215 from justinmayer/typogrify

Use the actively maintained typogrify-web package
Merge pull request #1214 from hrbonz/article_generator_write_article

Add a signal on article writing
Change CATEGORIES_URL and CATEGORIES_SAVE_AS docs to
make it consistent with TAGS_URL and TAGS_SAVE_AS.

Add default values to CATEGORIES_URL and CATEGORIES_SAVE_AS.
Merge pull request #1219 from iurisilvio/categories_url

Set CATEGORIES_URL and CATEGORIES_SAVE_AS
pep8 fixes
Simplify a bit pagination code.
More pep8 fixes and refactor the check for old settings.
Clarify docs about the DIRECT_TEMPLATES _SAVE_AS and _URL settings.
Merge pull request #1220 from saimn/misc

Clarify docs about the DIRECT_TEMPLATES _SAVE_AS and _URL settings.
fix test-suite import error
Append slash to href of link to site home

This is necessary to make the link to the site home work locally, because then SITEURL may be set to an empty string (in fact the Pelican default configuration sets it to an empty string in pelicanconf.py).
Merge pull request #1232 from hlapp/fix-sitelink

Append slash to href of link to site home
Merge pull request #1227 from alistairmagee/test_absolute_import

Fix test-suite import error