update PETDICOMExtension

* use non-private codes for encoding RWV quantities
Merge pull request #807 from fedorov/update-PETDICOM

update PETDICOMExtension
update PETDICOM

Fix compile error
Merge pull request #809 from fedorov/update-PETDICOM

update PETDICOM
update TCIABrowser

fix logo
Merge pull request #811 from fedorov/update-TCIABrowser

update TCIABrowser