Removed a redundant add tasks button on tasks index
Refactored nav bar and other code.
Fixed up tests.
Refactored nav bar into a partial. Created new layouts for controllers
so not all views have a nav_bar by default, only if they use the
application_nav_bar layout

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

Fixed nav_bar so it appears on top
Major: Major retool of task_sessions view and model (added :date field,
changed migrations) Sorting also works.
Not finished adding :date attribute to task_sessions.

Added date field to task sessions model and misc fixes to view.
Added flash notices and warnings to views by default.

Fixed gem file to use "thin" instead of "webrick" (default rails s web server). It has less errors and is better. Run bundle install and it will be used in lieu of webrick by default

Upgrade to Rails from 4.0.0 to 4.0.1 which fixes the "default date" problem (had no default date before) in the task_sessions.new form.

minor commit. squash it.

Task Sessions index and sorting is complete with css styling. Major
refactoring of code.
UI: Basic UI changes to task page