Add a message and error out when Pygments returns nil.
Went with @stomar's suggestion
Add jekyll_figure plugin
Merge pull request #2158 from lmullen/patch-1
Update history to reflect merge of #2158 [ci skip]
Merge pull request #2148 from jekyll/error-when-pygments-errors
Update history to reflect merge of #2148 [ci skip]
Add travis_retry to config
Merge pull request #2160 from jpiasetz/travis
Update history to reflect merge of #2160 [ci skip]
better document safe mode
Merge pull request #2163 from hildred/doc-safe
Update history to reflect merge of #2163 [ci skip]
add support for unpublished drafts

I keep all my ideas for blog posts as drafts in my draft folder. However I'm
only really working on a couple at once. This let's me mark drafts that I'm
not working on right now as unpublished so they don't clutter the site while
I'm checking on the other drafts.
Merge pull request #2164 from mrtazz/draft-unpublished
Update history to reflect merge of #2164 [ci skip]
Remove unneeded end tags.
Remove default type for CSS and JS files.
Add missing alt text.
Use double quotes consistently.