LW: fixed map reverse url
Merge branch 'master' into map_url_fix

* master: (103 commits)
  UK: bump to pyxform v0.9.21
  UK: moved media upload types to settings.SUPPORTED_MEDIA_UPLOAD_TYPES to ease configuration, added support for csv and zip media files upload as media files
  PLD: if empty username do not add double slash to submission URL
  PLD: test that submission fails if uuids do not match
  PLD: remove unreachable return
  PLD: sudo npm install
  PLD: update docs wrt touchform
  PLD: remove touchform refs, closes #268
  UK: ensure first_name, last_name are within 30 chars, closes #235
  UK: name to be a required field when adding a user profile
  UK: return proper error message when name is missing when creating an organization through the /orgs endpoint
  UK: pep8 cleanup
  UK: do not download xlsform if filename is empty string, resolves #102
  UK: specify default renderer classes for api, closes #253
  UK: fix generate qrcode test and fixture
  UK: test generate_qrcode function, add ghostscript to install/ubuntu, closes #251
  PLD: rever sav pip changes
  PLD: get sav binary from zip file
  PLD: pass user name to install postgis script
  PLD: take user as cli arg
  ...