[[ Bug 12058 ]] Backdrop is always black on Windows.
[[ Bug 12101 ]] reinstate hypercard bitmap importing broken by image refactor.
[[ Bug 11662 ]] Round buttons are drawn incorrectly.
[[ Bug 11370 ]] Anti-aliasing inconsistent for 1 pixel lines and curves.
[[ Bugfix 12146]] LC no longer hangs when setting tabstops to 2 equal numbers and then turning VGrid on
added .md file
Updates after Mark's feedback
Merge branch 'bugfix-12146' of https://github.com/runrevpanos/livecode into bugfix-12146
Merge branch 'bugfix-11662' of https://github.com/runrevmichael/livecode into bugfix-11662
Merge branch 'bugfix-11370' of https://github.com/runrevmichael/livecode into bugfix-11370
Merge branch 'bugfix-12058' of https://github.com/runrevmichael/livecode into bugfix-12058
Merge branch 'bugfix-12101' of https://github.com/runrevian/livecode into bugfix-12101
Merge branch 'bugfix-12146' into release-6.6.2
Merge branch 'bugfix-11662' into release-6.6.2
Merge branch 'bugfix-11370' into release-6.6.2
Merge branch 'bugfix-12058' into release-6.6.2
Merge branch 'bugfix-12101' into release-6.6.2