Remove 'edn' as a hard dependency of torquebox-core
Don't copy the entire app to a tmpdir to bundle dependencies

We now bundle the application in-place, doing our best to clean up
afterwards.

This also modifies the integration tests to optionally run all tests
from apps bundled inside jars:

    cd integration-tests
    PACKAGING=jar rake spec
Run integs with applications on disk and packaged as jars