also could we maintain backward compatibility for one release (@chrisfilo this should be 0.10 not 1.0 yet) and then deprecate the following release. this warning should change to a `DeprecationWarning` and import these interfaces `from .eval import ...`

if we really wanted to give the warning only when someone imports from misc, we would have to add dummy classes, something like:

(also could rename eval to metrics?)
```
import nipype.algorithms.metrics as nam

class Distance (nam.Distance):
    DeprecationWarning(...)
```