oval points
oval radius is min(width, height)
Merge branch 'master' of https://github.com/runrev/livecode into oval_points

Conflicts:
	prebuilt
code cleanup
360 degree ovals
single-quadrant wedges are working
quadrants 2,3,4 working
finally... roundrects, ovals, startAngle, arcAngle
[[ Bug 12250 ]] Hack around bug in NSSavePanel where validateVisibleColumns doesn't work.
Merge branch 'bugfix-12250' into develop
[[ Bug 12819 ]] Check that the stack is keyed in revAvailableHandlers / revAvailableVariables.
Merge branch 'bugfix-12819' into develop
[[ Bug 12946 ]] Stop the sound when asked to or when it finishes playing.
[[ Bug 11797 ]] Added doc note for scriptLimits removal.
embettered oval generation
[[ Bug 12822 ]] Use common code to initialise ssl certificates
[[ Bug 13009 ]] Fix LockBitmapFrame to succeed when locking unloaded unpremultipied image
[[ Bug 12990 ]] Use UINDEX_MAX to indicate 'do not select item' in MCPlatformPopUpMenu.
Merge branch 'bugfix-12990' into develop
[[ Bug 13007 ]] Make sure native encoded menus don't incorrectly convert tag.