add #serializeExpr to URL
#buildSpec uses #serializeExpr and real functions
towards a visitor-like buildSpec
cleaning up
making window switcher compatible with changed buildSpec
towards buildSpec for attributeConnections
comments rule the world!
buildSpec recreates morphic hierarchy and connections
accept null values in #setStyleSheet
Button>>ensureLabel
making buildSpec creation and morph construction more stable

tested for boxes, buttons, lists, texts
windowSwotcher don't forwards window when changing selection without accepting
buildSpec fixes for code editor
module dependency fix
lively.morphic.Morph.fromSpecString convenience function
cleanup for buildSpec properties
no builders anymore, creating a lively.persistence.SpecObject
fixing tests
pretty printing rules for Objects.inspect
improved printing SpecObjects