Make sure the Leaflet contribution footer is visible (was moved out of the viewport).
Add navigation to leaflet contribution footer.
Merge branch 'refs/heads/link-about-us-and-legal-on-homepage'
Add min and max zoom presets for map.
Remove hard coded lat/long for Berlin.

Not needed, as the map is not centered on Berlin anymore.
Merge branch 'refs/heads/feature/min-and-max-zoom-263'
Add missing attributes in ownership hash.
Delete duplicate attributes in rabl templates.
Merge branch 'bugfix/missing-ownership-attributes'
Gemfile: add redcarpet markdown gem
TextBlocks: add db migration, model and spec
TextBlocks: add controller, admin page, layout helper and markdown view
rake/seeds: generate textblocks

Add app/templates/text_blocks, and use rake receipt to generate text
blocks.
Remove pages controller, re-route /terms, /imprint and /about