Feature Request: Warnings on sketch upgrades including major or minor version number changes

[nickanderson]

From Ted:
"I think the minor version should change any time parameters are added or removed, and the patch version should be for backwards-compatible API changes. The major version is for major changes that require a code review, because the way the sketch works has changed substantially."

One small addition, minor version should change any time parameters are changed.

With this in mind any time the minor version changes users should get a warning that the change breaks backward compatibility and that any policy calling the entry point should should be reviewed. In addition any time the the major version changes users should be informed that the sketch has undergone substantial changes and testing is advised.

[tzz]

The DC API should express these warnings for all consumers.