Add Chrome+31 Support
Update Add Chrome+31 Support
Update README.md

Excuse me, I'm new on Github and I'm not familier with the Commit Options
Update add2home.js

fix: Detect Standalone on Chrome+31
Prevent localStorage errors in private browsing mode
Add check to sessionStorage also
Fix manual showing pre-checks
Merge pull request #1 from DJaeger/privatemodefixes

Privatemodefixes + Chrome+31 Support