disposing on dataref corrected
Merge branch 'cleanify_in_set_add'
this should have been already fixed??
bug fixed
factory constructors use silent add for better performance
forgot to silence also DataReference constructor
Fast fix of changeNotificationsMiin
References are made only when needed.
Clone
cleanify without refs
changeSets made lazy
.
more lazy init
making everything lazy
DataList uses DataReferences optionally.
Fix tests and repair sorted_list_view
Refactore usage of references in DataMap
_silentAddAll is really silent in DataSet
Some changes.
Merge branch 'effective_refs' of https://github.com/cleandart/clean_data into profiling