Removes support (sort of) for body background-color in IE8.

Removes the hex fallback declaration for the background-color, which can’t see HSL. However, when the Sass compiles, it converts HSL to hex, anyway, for some poorly-justified reason.
Adds styles for calendar page module.

Adds styles for .calendar-dt that create a daily calendar page effect for upcoming events.
Adds styles for calendar page module.

Adds styles for .calendar-dt that create a daily calendar page effect for upcoming events. Also removes IE8 background-color declaration on body.