MFC v4.4.4

What's Changed

• Update case.md - fix syntax issue by @sbryngelson in #211
• Boundary conditions refactor by @wilfonba in #213
• Converted isentropic vortex to example case by @RasmitDevkota in #205
• updated example case by @wilfonba in #216
• Upstream old fixes / features by @henryleberre in #218

Full Changelog: v4.4.3...v4.4.4