(TravisCI) Remove global phantomjs to force 'npm install' to download it
Merge pull request #843 from mrvisser/issue-843

Webshot fails to render links or etherpad docs
Set grunt-contrib-jshint to latest
Merge pull request #845 from mrvisser/issue-845

Set grunt-contrib-jshint to 'latest' when 0.9.0 is fixed