Add AMS library to requirements.txt
Add AMS library to requirements.txt

- I did consider keeping it constrained to 0.4.2, the latest
  version I tested against as I don't believe I added any
  meaningful test of this new functionality, but the developers
  say the 0.X series is stable.

stfc/ssm,tofu-rocketry/ssm,apel/ssm,tofu-rocketry/ssm,stfc/ssm,apel/ssm