Don't require the stack module to find the last value cache
Refactor stopwatch class
Correct Statistic prototype
Make LastValueCache take a /const/ array of stat names
Stats bug fixes
Cope with a statistic being passed a NULL LVC (useful in UTs)
Add comment about allowing NULL LVcs
Add support for unconditionally deleting items from the store
Remove pjsip include from lvc
Fix indentation
Code review feedback - delete from the read replicas
Merge pull request #12 from Metaswitch/deletion

[Reviewer: Andy] Add support for unconditionally deleting items from the store
Make load monitor methods virtual to allow for mocking
Various fixes to support RTR and PPR handling
Merge pull request #14 from Metaswitch/ppr-rtr-support

[Reviewer Graeme] Various fixes to support RTR and PPR handling
Move interposers to cpp-common
Add Acct-Interim-Interval to the AVPs list
Make val_json() easier to use
Merge pull request #16 from Metaswitch/acct-interim-interval

[Reviewer: Andy] Add Acct-Interim-Interval to the AVPs list
Merge pull request #17 from Metaswitch/better-val_json

Reviewer Rob - Make val_json() easier to use