1.5.0

1.5.0 (2018-10-14)

The big feature in this release is the introduction of "targets" which act as
sort of "virtual nodes" in the graph. It provides a nice way to logically group
stacks.

• Add support for "targets" [GH-572]
• Fix non-interactive changeset updates w/ stack policies [GH-657]
• Fix interactive_update_stack calls with empty string parameters [GH-658]
• Fix KMS unicode lookup in python 2 [GH-659]
• Locked stacks have no dependencies [GH-661]
• Set default profile earlier [GH-662]
• Get rid of recursion for tail retries and extend retry/timeout [GH-663]