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.
Add .idea to ignore.
Merge remote-tracking branch 'remotes/origin/master' into gh-pages

Conflicts:
	.gitignore
	_layouts/post.html
	_site/blog/call-for-papers/index.html
	_site/blog/hello-world/index.html
	_site/blog/index.html
	_site/cod/index.html
	_site/css/main.min.css
	_site/feed.xml
	_site/index.html
	_site/logistics/index.html
	_site/speakers/index.html
	_site/team/index.html
	js/sources/jquery.appear.min.js
	js/sources/jquery.countTo.min.js
	js/sources/typed.min.js
	js/sources/waves.min.js
Update .gitignore.