Feature/cleanup

- cleans up messy search methods after a merge a while ago,
- cosmetic changes, f.e. a couple of missing trailing and leading forward slashes,
- unifies fixture vocabulary,
- couple of typos,
- updates gems,
- updates README to include support for Ruby 2.1.0,
- combines two login views into one.

=> mostly minor changes, but imho makes code a bit nicer.