fixes ActionView::Template::Error (undefined method `total_pages' for @ads) on empty search
adds proper meta description for ads so Facebook can preview it
Merge branch 'master' of https://github.com/dirkschumacher/iUPB

# By Dirk Schumacher (9) and Michael Whittaker (3)
# Via Dirk Schumacher (3) and Michael Whittaker (1)
* 'master' of https://github.com/dirkschumacher/iUPB:
  Update README.md
  typo in readme
  minor issue
  adds links to persons in readme
  minor changes
  fixes a typo
  minor changes
  fixes the commands (markdown `` instead of <>)
  typo in readme
  adds links to other apps
  adds links and better instructions to the readme
  adds a first version of a real readme
closes #36 - changes report links to http post and adds nofollow