User should be able to assign employees to training programs

[stevebrownlee]

Acceptance Criteria

Given user is viewing the details of an employee
When user clicks on the Assign to Training Program link
Then a form should be presented in which all eligible* training programs are in a drop down
And a button labeled Assign

Given user is viewing the training program assignment form
And the user has chosen a training program from the dropdown
When user clicks on the Assign button
Then the relationships should be created in the database
And the user should be redirected back to the employee detail view