Move memcached to use absolute times
Add get_u32_from_avp function
Don't auto-copy sessions from request to response
Add mockdiameterstack from Homestead
Speed up unit tests that need to wait for a signal
Code review feedback
Implement new cassandra_store framework
Add back in transaction timing
Markups
Merge pull request #144 from Metaswitch/sto831

[Reviewer: Rob] Implement new cassandra_store framework
Rename fields in RowColumns to be more accurate
Make do_async take pointers (rather than references to pointers) to get around pointer aliasing rules
UT fixes
Change ownership of OPeration/Transaction during async execution
More UT fixes
Fix bad HTTPStack merge
Change handlers->tasks in httpstack_utils.h
Add a delete_slice utility function
Merge pull request #148 from Metaswitch/fix_mock_request

[Reviewer: Ellie] Fix bad MockHTTPStack merge
Add common files