Data parsing flow/architecture about blik

[brisvag]

Some points/questions:

• would you then have subclasses for each block type that implement common functionality?
• to implement something like htis, it's important that we redesign functions like the star file reader so that it checks the "header" of the file in a computationally smart way, so we can retain this level of pre-checking and avoid computation waste. Unfortunately, loading star files/dynamo tables is not as trivial as loading an image with a fixed and defined header format.
• I'm still not sold on the object-oriented approach and its benefits... In my a reader nevcer needs to hold a state, but I guess this is not that important

As a general idea, I agree with you!

[brisvag]

Closed with #84.