Expose i18n to grunt config for Firefox manifests

Merge pull request #3 from keithclark/package-task

Support packaging on Windows OS

Add readme note about private keys and Opera issues

Update readme to include package instructions

Ignore private keys (*.pem) and the dist directory

Allow extensions to be packaged using grunt

Merge pull request #2 from pepelsbey/patch-1

Proper naming for Node.js and npm

Better screen grabs

Add screenshots to readme

Initial commit