Update delete events
Merge pull request #19 from Metaswitch/delete_updates

[No reviewer] Update delete events
Add gemini log for empty twin prefix parameter
Fix number of empty twin prefix log
Merge pull request #20 from Metaswitch/empty_twin_prefix

Reviewer Ellie: Empty twin prefix
Correct local roaming name
Merge pull request #21 from Metaswitch/local_roaming_name

[No reviewer] Correct local roaming name
Add SAS events for GRUU handling
Merge pull request #22 from Metaswitch/gruu

[Reviewer: Mike] Add SAS events for GRUU handling
Change IMS subscription logs to refer to registration data
Update version number
Merge pull request #23 from Metaswitch/sto851

[Reviewer AMC:] [DO NOT MERGE] Change IMS subscription logs to refer to registration data