Revert h3 back to h2

Will adjust size in CSS instead
.day-heading, .vevent padding updates

Percent-based padding resulted in inconsistent display when the .day-heading was sticky—it was farther right than the events below. I used rems (and px fallbacks) for better horizontal alignment.
Merge branch 'seven-year-itch' of github.com:unl/UNL_UCBCN_Frontend into rdee-four
Adjust header font-sizes

In a previous commit, I changed the header markup to adjust font-size. Kevin was concerned that this disrupts the page outline. This commit uses CSS instead.

See #106
Additional .day-heading, .vevent padding updates

Left padding was larger than right padding.
Commit 1f3c1069
Reduced padding-bottom on @bp2 .vevent
Year-nav prev/next year styling
Added padding-bottom to .year-nav
Adjusted .vevent padding (again)

Adjusted to account for events that include no description.
Incease .vevent padding-bottom

…because I can't make up my mind.
Update display of search results
Improve Subscribe styling @bp1–@bp2
Improve Subscribe styling < @bp1
Remove (Search) Subscribe title attributes
Adjust Submit An Event font-size
Initial search updates

Added label
Removed grid from events-nav

Using floats and percentage-based widths instead
Remove margin-left from Submit An Event icon

Removed so the icon is flush left with other content at mobile width.
Changed 'Day' to 'Today'  in .events-nav

Changed to facilitate the removal of the 'Return to today' link. There is concern for how much event content is visible at mobile widths. This link is redundant (there are 2 other ways to access today's events—the date on the calendar widget and the above 'Day'/'Today' link) and it pushes content down.
month_viewcal data-header font-size < @bp2