Add missing resources for Web Workers article
Enable HSTS for dev.opera.com
Switch to HTTPS
Update link
Redirect HTTP to HTTPS
Update YouTube URLs to use HTTPS
Compress images
Add Opera 24 blog post
Mention CSS `all`
List what’s new for users as link to desktop team blog (saved you a click, SEO)
Change "private tabs" into "private windows"

I wish there actually were private tabs.... *sigh*
Update `showModalDialog` info

Ref. #179.
Merge pull request #180 from operasoftware/issue-179

Update `showModalDialog` info
Merge pull request #178 from Christoph142/patch-1

Change "private tabs" into "private windows"