USER STORY: Edit a task

As a user I can edit a task so that I can fix any mistakes or change the information on the task.

Acceptance Criteria

[x] When I click to view a task, then i am given the option to edit a task
[x] When I click 'edit task', then I am able to change the information
[x] When I click 'save changes', then I am notified that the change was successful
[x] Then I am able to see the updated information on the task detail page
[x] If there is an error, then I am notified that there was an issue updating my task
[x] If I change my mind, then I am given the option to cancel my changes
[x] Then I am notified that my changes were not saved