Created TaskHistory controller and set its default route.
Set title for task history page.
Made tasks a dropdown, and added task history as a link.
Added helper to check if the current event is a sleep event.
Added TaskGroup class, as well as helpers to generate a list of TaskGroups from our task history.
Moved all TaskGroup related helpers into application helpers.
Removed call to getTaskGroups from controller, this should now be done in views.
Added helper for rendering task group.
Added task group partial.
Added rendering of time of sleeping, waking and total time awake.

application_helper.rb

- Added variable setting for waking/sleeping in renderTaskGroup
- Created helper getTimeString for returning a DateTime object as a string.

_task_group.html.erb

- Created wake time section and populated with data.
Added processing for task breakdown and task duration
Added time determination for task categories.
Removed debugging print statement for task duration
Added time calculation based on category.
Added rendering of task group to our partial.
Added temporary title for daily review.
Added call to render task group for current day to dashboard.
Fixed processing of current active day.