Adds tt-today class to the tt-day that is the dow :: from PULL #5
- Layout changed so the tt-day elements are on the bottom, then tt-hour
- Added zindex to activities to bring them to the top
- Added roles to tt-day and tt-activity elements, this lets the grid to
  be treated as a grid by screen-readers and keyboard users
- Added aria-hidden to hour rows/columns, we include the time data
  within the tt-activity for screen readers
from PULL #5
Add amPm time format option for the hours display
from PULL #5
Removes redundant $(container) calls
from PULL #5
correct settings referecences
from PULL #5