Fix blog posts pages

Fixes social sharing links and removes some characters ("-->") being printed on the page.
Remove unnecessary generated files

Removes _site/ output folder.
Merge pull request #11 from erickmendonca/master

Fix blog posts pages and removes _site/ files.
Merge branch 'master' into develop
Updated partnership proposition, changed .explore icon animation, added new tickets block, merged js plugins into one file, refactoring of scripts.js, minor style fixes
Merge branch 'develop' into gh-pages