Umlaut 4.1.0 released

[Jonathan Rochkind]

Umlaut 4.1.0

This release is expected to be entirely backwards compatible with 4.0, and
should be an easy upgrade. But testing in a non-production environment
is always advisable.

Umlaut now works with Rails 4.2.

We recommend upgrading to Umlaut 4.1, Rails 4.2, and using ruby 2.2.x, as soon
as convenient. Note that ruby 1.9.3 is no longer supported by the ruby project.

More information on changes at: https://github.com/team-umlaut/umlaut/releases/tag/v4.1.0