style: blank line after Markdown headings
style: blank line after Markdown headings

Addresses Markdown link error MD032
UW-Madison-DoIT/uw-frame,thevoiceofzeke/uw-frame,UW-Madison-DoIT/uw-frame,thevoiceofzeke/uw-frame,uPortal-Project/uportal-app-framework,paulerickson/uw-frame,uPortal-Project/uportal-app-framework,thevoiceofzeke/uw-frame,uPortal-Project/uportal-app-framework,paulerickson/uw-frame,UW-Madison-DoIT/uw-frame,paulerickson/uw-frame