should run a nightly build on released versions

* calabash-cucumber
* briar
* xamarin-test-cloud
* run_loop
should not send pry to the XTC
monkey-patch cucumber 'pending' for XTC

Pending tests fail but generate no reports.

https://github.com/xamarin/test-cloud-frontend/issues/186
common tasks should be in ci-prepare.rb
tests againsts releases should go in a series
should have a job against the master branches

pulling masters from:
* run_loop
* briar
* calabash-cucumber
* calabash-ios-server
WIP changelog/1.5.0