Merge pull request #10 from ragingwind/master

Updated changes in webapp generator
0.2.1
Use a checkbox prompt for permissions
Merge pull request #12 from passy/checkboxes-ftw

Use a checkbox prompt for permissions
Added 'files' property to package.json
Bumped and tested all dependencies
Adds yo as peerDependency
0.2.2
Add time-grunt

Shows elapsed time of tasks at the end.
Switch to load-grunt-tasks

https://github.com/sindresorhus/load-grunt-tasks
Update dependencies
Bumped generator dependency
0.2.3
Update scaffolding for chromeapp permission