Patch to 4.4 release

Priority projects

• Replace all code & doc references to herokuapp with CNAME (#840),
• Cleanup obsolete bits in SpringDesignSoftware.org (#842),
• Repair any minor problems discovered in v4.4.1 (#845, #846),
• Gtag changes (#849)

Other stuff:

• Update Message Of The Day for v4.4.2 (#841),

• Improve readability on smartphones (#839)

• documentation updates (#843)