Removes screen requirement for grid.

Removes on .unit-1-1, .unit-1-2
Merge branch 'master' of https://github.com/revoltpuppy/Evergreen into grid-system-fixing
Improves .unit-1-1 and .zebra-striped

Better supports .unit-1-1 in the new flexbox-based grid system. Also, includes a fix for .zebra-striped grids.