ALMT + DIG Tests

[priverop]

Create test for each type of .dig format. The goal is to have 1:1 for export and reimport.

• dig + almt Deserialze
• binary - alar 1:1 retransform
• binary - dig 1:1 retransform
• dig + almt 1:1 retransform

[priverop]

The last test we need is:

Dig + Almt -> BinaryFormat (png) -> Dig + Almt -> BinaryFormat (png)

Are these PNGs equal?

To do that we need to do this first (because we would need to duplicate more code):

#43