Add by_band kwarg to batch, allow each lightcurve band to be processed independently
#474
| Job | Run time |
|---|---|
| 27s | |
| 2m 38s | |
| 2m 16s | |
| 43s | |
| 43s | |
| 43s | |
| 42s | |
| 42s | |
| 42s | |
| 9m 36s |