Released under the Apache license 2.0 [1]. I checked because sometimes MS releases code that can only be run on Windows/Azure and calls it Open Source but does

Released under the Apache license 2.0 [1]. I checked because sometimes MS releases code that can only be run on Windows/Azure and calls it Open Source but doesn't meet the OSI definition. [1] https://rx.codeplex.com/SourceControl/changeset/view/ae16c4ef7c9e#Ix.JS%2flicense.txt https://rx.codeplex.com/SourceControl/changeset/view/ae16c4e...