v0.5.0

New in this release:

• When searching within the Fashion collection, one may now use a selection of fashion-specific facets from within the "more filters" dropdown
• A foyer page for image galleries
• Individual pages for image galleries

Changed in this release:

• Links to navigate between chapters within exhibition pages are shown on each chapter page
• Exhibitions credits are shown on their own page after the other chapter pages

Under the hood:

• Changes to Contentful content models to support upcoming exhibitions and image galleries
• Redirection of URLs on portal.rb, the current live Europeana Collections site, to equivalents here on portal.js in anticipation of replacement of the former with the latter at www.europeana.eu