correct path for linalg solve
argument expansion
correct for tuple for box
test perspective coefficients calculation
test perspective transform
crop test and draw text test
rename aolcore to util
test read_data
determine run image paths
barrel correction
spec
functional raw processing

made a lot of changes.

- created a RawImage class that significantly simplifies code and allows
  corrections to be applied easily to a single image in a run.

- RawRun class is a lot cleaner and manipulates RawImage objects

- sample_interval header in parameters file, specifying how frequently
  cameras take images.

- some tests (need more)
TODO