Log Message:
Update ruby-tins to 1.7.0.

2015-11-09 Release 1.7.0

* Officially require ruby >= 2.0 and use new hash syntax.
* New feature attempt: sleep:-30 sleeps upto 30 seconds while retrying
  with an exponential waiting pattern.
* Remove rotate and shuffle, recent rubies all support them.
* Add an object oriented view on method signatures and use it to create
  method descriptions.