Calling the `.value` method on an input task returns `InputTask[A]`, which is completely unintuitive. I think it's basically a bug in `.value`. This change deprecates the `.value` call on input tasks, in preparation to the removal in sbt 1.0.
In most cases `.evaluated` should be called, which returns `A` by evaluating the task. Just in case `InputTask[A]` is needed, `inputTaskValue` method is now provided.
One of the motivation for doing this now is the deprecation of old operators `<<=`, which forces more users to convert to the `:=` style and potentially run into the `.value` behavior.
eugene yokota