Added InlineCSS, Zopfli and Vulcanize in Tools.yml
Merge pull request #23 from DonSinDRom/master

Added InlineCSS, Zopfli and Vulcanize in Tools.yml
Update content
Remove wrong slides from talk
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Paul with a P
Articles, talks and books can now have multiple authors. Update content. Closes #25.
Update content
Update content
Update content. Closes #22.
fixed statico.io link with protocol prefix to avoid generated link as relative url
* also updated category to CSS Optimization