Pansharpening destroys projection information

Download and pansharpen a scene. Note that this does not cross the dateline as in #150

```
scene=LC82080052014154LGN00
landsat download ${scene} -b 1234567891011 -d .
mkdir ${scene}
tar xvf ${scene}.tar.bz -C $scene
# rm ${scene}.tar.bz
landsat process --p --pansharpen ${scene}
mv ~/landsat/processed/${scene}/${scene}_bands_432_pan.TIF ./${scene}
```

I'd expect the projection information to be the same or similar to B8, but it is not. In addition to a different projection (why?), the origin and pixel size don't appear correct.

B8

```
Origin = (483592.500000000000000,8692507.500000000000000)
Pixel Size = (15.000000000000000,-15.000000000000000)
```

PAN

```
Origin = (1589074.447645094944164,14534055.736723199486732)
Pixel Size = (72.942212531325680,-71.622120806659439)
```

Shouldn't PAN pixels be 15 m?

Also, I'm not sure why, but this data causes all sorts of issues in GRASS GIS. It won't align with the other bands.