website/www: add blog post for share
website/www: reorder videos

cc/ @mitchellh
website/www: remove gnu/linux to stop wrapping
website/www: add a note about fullscreen
website/www: share post html encoding of the emdash
Update 2014-02-24-feature-preview-vagrant-1-5-share.html.markdown
website/www: keep the mdash on the blog post
communicators/ssh: call ready? when waiting

This lets things like the SSH key go in