Pass header to summaries constructor

This saves a little amount of work per tuple and is more streamlined.
Merge pull request #24 from mbj/summaries-streamline

Pass header to summaries constructor
Merge pull request #23 from snusnu/master

Upgrade backports dependency
Remove file from defunct service
Add IRC notification of the build status
Upgrade gem dependencies
Update flay threshold
[ci skip] Fix typo in Relation::Operation::Deletion
Merge pull request #25 from snusnu/fix-doc-typo

[ci skip] Fix typo in Relation::Operation::Deletion
Update dependencies

* Use future proof version of backports
* Bump yard and yardstick