first step towards smarter dicom notifications

we now can get information from the entity sending the data:
'#a': calling application entity title of the peer Storage SCU
'#c': called application entity title used by the peer Storage SCU to address storescp
'#r': calling presentation address, i.e. hostname or IP address of the peer Storage SCU
cleanup the files we just created

we just delete the information about the entity pushing the data.
next step is analyze the informatiojn before deleting it!
fix typo
dicom emailing is ready for merge
Merge branch 'dicom_email'