Removes old cookbook files.
Fixes typo in the homepage code examples.
Removes dead topic from _config.yml
Updates cookbook pages from develop.
Merging.
Addresses issue #336 by adding support for twitter cards.
Merge branch 'gh-pages' of github.com:sapo/Ink into gh-pages
Fixes typo in flexbox documention.
Removes gallery-modal.png from gh-pages root.