Merge pull request #49 from mathjax/update_demos

Update demos

Fix toArray() calls

Update puppeteer package.json

Merge branch '3.1.3-update'

Update *-page to not include styles if no math is found (speech version)

Update *-page to not include styles if no math is found (speech version)

Update *-page to not include styles if no math is found (speech version)

Update version to 3.0.5

Add release number shield to README

Correct link to examples (use web examples)