Update README.md

Merge pull request #17 from fresheneesz/patch-1

Merge pull request #1 from mbijon/mbijon-patch-1

Update README with modern/working alternatives to Inboxapp

Adding the obsolescence note to the readme

added unread messages count to backend

format plaintext emails as html

basic user auth

fix iteration bug in cabinet

fixed frontend email ordering bug

fixed escape hatch

added logout button

multiple user auth

display emails in plain text for now

disabled overwriting postmap file