Etch 3.11 Released

Explicitly invoke user actions (setup/pre/post/test/etc.) via "sh -c" so that syntax like "FOO=bar myprogram" works

Wrap exceptions from templates with a message indicating the template filename and associated file filename to help the user figure out where the error occurred. Errors from etch scripts were already subject to this treatment.

The client version is now in sync with the overall package version, so with this release the client version jumps from 1.18 to 3.11.

And some misc. bug fixes.