internationalization fixes
Support for http:// and https://
Show YouTube videos in a modal dialog
Use external file for easy script reuse and support contribute.html
* Update reveal styles

* Scroll modal into view
JS calculate the dialog size
Merge remote-tracking branch 'upstream/gh-pages' into support-https

Conflicts:
	index.html
Merge remote-tracking branch 'upstream/gh-pages' into i18n-fixes
CSS tweaks
Add subtle link to Starter Bugs on GitHub
Merge pull request #81 from SAPlayer/support-https

Support for http:// and https://
Merge pull request #79 from SAPlayer/youtube-modal

Show YouTube videos in a modal dialog
Merge remote-tracking branch 'upstream/master' into css-tweaks

Conflicts:
	index.html
Apply link style to "Starter Issues"
Use new link for GH labels
Add _en locale to improve translation experience
Merge pull request #85 from SAPlayer/css-tweaks

CSS tweaks
Merge pull request #91 from SAPlayer/locale-en

Add _en locale
Merge remote-tracking branch 'upstream/master' into i18n-fixes

Conflicts:
	locales/README.md
	locales/de/translation.json
Merge pull request #74 from SAPlayer/i18n-fixes

Internationalization fixes