ufo-kit/concert — pull request #177 by sensej (2013-12-17 09:45:29+00:00)
Title: Backproject one slice only

Saves some mental health of the users, because instead of:

```python
produce(sinograms(backproject(crop_to_2d(viewer()))))
```

one can simply do

```python
produce(sinograms(backproject(viewer())))
```

I also simplified the Concert `backproject` a _lot_.