network: URL.isURL method
diffing: remove old diff code
lang: Functions.waitFor to wait for multiple async processes
lists: mutiple selection with shift key when list.multipleSelectionMode === 'multiSelectWithShift'
diffing: remove deprecated OpenDiffViewerCommand in SCB
diffing: auto load new differ
diffing: new differ supports diffing via JsDiff lib or via commandline diff command (unified diff). lively.ide implments interface to run diffs:
diff -- strings
diffFiles -- files on server
diffURLs -- arbitrary urls
diffVersions -- versions of Lively files/objects
diffJSON -- objects that are JSON pretty-printed and then diffed
diffing: the version viewer now supports diffing when multi-selecting versions
Merge pull request #234 from LivelyKernel/diff-support

Diff support