Terminology for installations / instances / releases should be consistent

[itowlson]

CNAB draft spec:

• "Elsewhere, this field is referenced as the installation name." https://github.com/deislabs/cnab-spec/blob/master/400-claims.md
• "The installation name is the name of the instance of this application. The value of CNAB_INSTALLATION_NAME MUST be the installation name." https://github.com/deislabs/cnab-spec/blob/master/103-bundle-runtime.md#environment-variables

duffle install docs: "This command installs a bundle with a specific installation name. A claim (a record about the application installed) is created during the install process and can be referenced by the installation name."

duffle run docs: "The 'run' command takes a ACTION and a RELEASE NAME"

duffle claim docs: "A claim is a record of a release"

duffle uninstall docs: "Uninstalls an installation of a CNAB bundle."

Let's standardise on a preferred term, and use that consistently throughout the Duffle docs. At the moment, the CNAB WD seems to prefer installation - are people okay with that in Duffle too? If so I will send a PR.

[glyn]

Thanks for raising this. I agree with the term installation.