Whitespace changes from vim.
Allow for falsey emails
Add anon login & modal on "login" page
Merge branch 'master' into feature/284
Add test for anonLogin
Merge pull request #287 from wombleton/feature/284

Allow "anonymous" submissions
[#284][s]: tweak login form page (inline modal).
[ux][xs]: remove link to contribute page (we don't need detailed instructions here).
[ux][xs]: set notice in overview page if not places yet.
[ux][xs]: tweak to last commit.
Merge branch 'feature/284' into develop
Merge branch 'develop'