changesets: necessary lib (references in ChangeSets.js)
fix an issue with older Parts' versions, that are not Date objects, but formatted strings
PartsBin: parly repaired the display and loading of older versions of parts

we still cannot synchronously load old version
Lively2Lively: increased the protocol of the Lively2Lively-module by the two fetching methods used by both, the NotificationIcon and the WorldsListener
VersionViewer: parly fixed the VersionViewer, i.e. it can display a list of older versions, and show them when needed. Visiting and Reverting is still not possible, and will only be fixed upon request.