Merge pull request #412 from onaio/411-tagging-projects

411 tagging projects
doc fixes, missing -H
UK: return 404 incase queryset is empty and a pk for the data was passed in
Merge branch 'master' into data-endpoint-fixes

* master:
  PLD: get stars for any user
  PLD: move list of starred projects to /user/starred
  PLD: sort data for consisted profile order
  PLD: add get project user has starred
  PLD: permissions for starring
  PLD: add star link between users and projects
  PLD: fix filter class and add tests
  PLD: add filter for tags
  UK: return 400 response on multiple nodes with same name, closes #267
  PLD: ignore all gzipped things
  PLD: add memcached
  PLD: typos fix
UK: update test, expect 404. closes #419
Merge pull request #413 from onaio/data-endpoint-fixes

data endpoint fix, maybe related to #419