Issue #492: Add support for multiple simultaneous environments

[erikbra]

Add support for multiple environments, separated by space, ; or ,
This makes it possible to create orhotogonal environments, and run scripts
that are specific to a combination of environments.

Example: You have:

• Some scripts that you only run for Customer 1
• Some scripts that you only run for Customer 2
• some scripts that you only run for Azure
• some scripts that you only run for AWS
• some scripts that you only run for Dev.
• some scripts that you only run for Test.
• some scripts that you only run for Prod.

Then, you can combine any of these environments to create a specific environment, to avoid
having to create an environment for each combination.

E.g.:

  --env Customer1;Azure
  --env Customer2,Azure
  --env Customer3
  --env Customer1 AWS Dev
  --env Customer1,AWS,Test
  --env Customer2;AWS;QA
  --env Customer2 AWS QA

etc.

[erikbra]

Would this solve your requirements, @JackNWeems?

[hoangthanh28]

Btw Erik you've done amazing steps to push grate forward. I've been very happy since then. Keep it up.

Thanks.
Thanh Tran.

[erikbra]

Thanks, @hoangthanh28. I'm very happy with the contributions you have made, too! :)