share articles fetched on the front end (using AngularJS) and send to our Rails API as interesting share.
add share method on HomeControler
fill out the Share service
Edit shares_controller.rb to respond to json requests and create the Share
added email validation on the share model
Merge branch 'chapter2.6-client-side-validation' into chapter2-angular-in-rails-asset-pipeline
Merge branch 'chapter2-angular-in-rails-asset-pipeline'