Merge pull request #589 from rdwallis/upprop

run mvn versions:update-properties
Explicitly set empty request body to null. Fixes an issue with IE.
Make PlaceManagerImpl use Historian instead of History
Merge pull request #592 from rdwallis/historian

Make PlaceManagerImpl use Historian instead of History
Merge pull request #591 from ArcBees/cv_bug_undefined_body_ie

Explicitly set empty request body to null
init historian in ctor
Merge pull request #593 from rdwallis/historian2

init historian in ctor
Inject DefaultHistorian into DefaultPlaceManager
Merge pull request #594 from rdwallis/historian3

Inject DefaultHistorian into DefaultPlaceManager
make PopupPosition ctor public
type safe slots
fix permanent slot binding
throw removable errors in orphan and adopt
minor fix