Affects Version/s: None
Fix Version/s: None
Too many people are doing crazy stuff with conditional loading just to support both 1.1 and 1.2 simultaneously. This way lies madness.
To avoid this, lets forward-port all the 1.1 namespaces that were removed or renamed in master, e.g. duck-streams, seq-utils, str-utils, etc. Just copy the old files from the 1.1 branch, so that no behavior changes.
Add a printed deprecation warning at the top-level of each of the old namespaces, like
(println "The foo namespace is deprecated, please use bar instead.")
Post 1.2 release we can remove the deprecated namespaces.