Fixing up tests.
Fixed 2 /html tags on application.html.haml
GemFile fixing
Refactorered steps. For some reason task_sessions index is a bit messed
up (table column and table not center aligned)
Fixed up view for task sessions. CSS styles now consistent and no
redundant classes.

Still need to add date to task_sessions model
Not finished adding :date attribute to task_sessions.
Fixed nav_bar so it appears on top