* Properly cleanup Dict::Pair when serializing HasPropWithQueryValue
* Make sure pickling doesn't change original molecule
* Fix bad cut and paste
* Add PairHolder utility class for memory management of non Dict Dict::Pairs, fix mem leak in pickler
* Edit comment to force a rebuild
* Ignore PairHolder from Java/Swig builds
* Ignore PairHolder API from swig
* Reponses to review
* Add backward incompatible change
* Make release note a bullet point