Added packages and classes for sending email through SendGrid
New ActivationLink class
Added ActivationLink class file to project
outcommented code to avoid build failure
Merge pull request #82 from j4kobbech/add-activation-link-class

Add activation link class
Add api method to activate a user
Add api method (client-side) to activate user
Add view and controller to activate user
Configure routing for the activation page
Adding files for activation to the project