FEATURE: smf2 import script
made postprocessing of posts with delay quotes conversion resumable
improved option handling
FIX: If a topic title edit fails, revert to previous title.
FIX: Stop endless loading at the bottom of a user's stream.
FIX: If a site has no logo, don't show a broken image in the digest.
add link to importers
add link to importers in Quick Start Guide
FIX: Limit the `maxLength` of the title text fields to the site setting
for the maximum length.
FIX: Clicking an avatar in an expanded post should show the user
expansion popup.
add note about possibly losing TL3 designation
improved New User Welcome tips with pictures
don't need giant screenshot there
removing 100% image width from embedded posts
FEATURE: ship lazyYT plugin by default
embdedded post alignment, minor fix
more New User Welcome Tip improvements
Merge pull request #2560 from awesomerobot/master

removing 100% image width from embedded posts
minor copyedits, move images to discourse.org
Update INSTALL-digital-ocean.md