Update cpp-common and add commit call
Merge pull request #113 from Metaswitch/commit_log

[No reviewer] Update cpp-common and add commit call
Update cpp-common
Merge pull request #115 from Metaswitch/cpp_up

[No reviewer] Update cpp-common
Update homestead code to the new DiameterStack API
Revert rogue change
Take cpp-common at master
Merge pull request #117 from Metaswitch/updates-to-allow-acct-apps

Reviewer Ellie - Update homestead code to the new DiameterStack API
Update homestead_api.md

Fix formatting.
Corrected libzmq-dev to libzmq3-dev in dependencies section
Merge pull request #118 from Metaswitch/dependencies_fix

(Andy) Corrected libzmq-dev to libzmq3-dev in dependencies section