Pull request #71: Dev

Merge in TPSH/ckanext-odsh from dev to master

* commit '72df82d4':
  fixes bug in breadcrumbs
  fixes 2.4.5a (title for links in breadcrumbs)
  fixes 1.4.11a (contrast of blue buttons)
  fixes 1.4.11a (contrast of dots in pagination)
  fixes 1.3.1b (use <ul> and <li> for list of datasets)
  fixes 1.1.1b (aria-hidden for preview)
  fixes tests
  removes gray block from collection summary
  fixes bug in jinja block bodytag
  restores negative margin for search-form
  removes negative margin from odsh-dataset-heading
  removes gray box from smartphone layout