Closed Feature: Add pixel storage settings to MagickReadSettings [1039]

Add a PixelStorageSettings class that can be used to read pixels from a byte[]/stream/file.
Comments: Resolved with changeset 28301: Added pixel storage settings to read float/double pixels.
Refactored MagickReader.
Changed default format of MagickImage.ToBitmap to Png.
Created separate class for testing MagickReadSettings.