#249: Main Nav arrow placement on tablet need moved
#247: Menu - Change Superfish "Expand"/"Collapse" to triangles
Added Landing Page (250x250) image style.
Added Landing page entity view mode.
Combined image style and entity view mode.
Facility view to use new view mode.
Programs view to use new view mode.
Styling of new view modes.
Merge branch 'feature/247-249'