conda env export has no-builds as default

[malev]

• --no-builds deprecated
• --with-bilds new flag
• conda env attach adds environment without builds name

[groutr]

I think there is a better solution than stripping build numbers. It would be a whole more useful if conda env matched to varying levels of strictness when replicating an environment. The user could control whether conda-env matches just the package name, package name + version, or package name + version + build number.

This would mean that environment.yml should include build numbers. I think it is better to adjust the interpretation of the these values rather than strip them out entirely.

Thoughts?

[malev]

on hold for now