Merge pull request #578 from BenDol/master

Improved Dispatch Hooks (Separated Rest/Rpc)
prevent concurrent modification of presenter children
remove unused var and suppress warnings unchecked
Merge pull request #583 from rdwallis/conpres2

prevent concurrent modification of presenter children
run mvn versions:update-properties
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
Merge branch 'master' of https://github.com/ArcBees/GWTP into merge_f1_f2