StackStorm v1.5.1 release.

Creating tag v1.5.0 for branch v1.5

v1.4.0 release.

Creating tag v1.3.2 for branch v1.3

Merge pull request StackStorm#2470 from StackStorm/revert-2469-v1.3

Revert "Ngnix rule for mistral_api redirect"

temp tag

Creating tag v1.2.0 for branch v1.2

Creating tag v1.1.1 for branch v1.1

Creating tag v1.1.0 for branch v1.1

Creating tag v0.13.2 for branch v0.13