Added email address domain validation
Merge branch 'master' of github.com:azkaban/azkaban-plugins into li-emails-only
Refactored email validation code and added tests
Use HashSet constructor that takes a Collection, resolve merge conflicts
Added examples to the help text under the access list and notification list fields
Merge pull request #74 from Erwa/li-emails-only

Fix for Issue #73: Added email address domain validation; also changed error message to show all validation errors instead of just the first one; also added examples to help text under access list and notification list fields