sidebar
Share links in sidebar
show meta title/description/image if available
added translations and metadata for sidebar
set metaDescription for items
Merge branch 'master' into sidebar

Conflicts:
	app/views/layout.blade.php
hide TP mockup in sidebar
add php 5.5 dependency
map og language to countrycode and remove alternate locales

1. facebook needs country codes (https://developers.facebook.com/docs/internationalization/#locales)
2. removed alternate languages, because we host the different languages on subdomains.
 > The og:url and og:type in the meta data must be the same regardless of the fb_locale parameter. Note that this means the og:url field should not reflect the fb_locale parameter. Other meta tags for localized objects can be different.
 > (source: https://developers.facebook.com/docs/opengraph/guides/internationalization)
readd gw2spidy link
Add sidebar for #35