fixed #518
fixed #521

deleting variable watchers by dropping them on the palette resulted in
wrong ones to be created when showing them again
added Snap! Connectivity Strategy to repo
Scale down oversized images to current stage dimensions

rather than to 480 * 360
Thanks, Dan, for reporting this!
fixed “lost sprites bug”

ensure duplicated sprites keep wearing their current costume through
save and re-load
improve unique sprite- and costume names
Display “empty” Contexts as empty rings

(e.g. continuations). Brian was complaining about empty continuations
“sucking” up the watchers and value bubbles.
new “JavaScript function” primitive

Go figure…
updated credits