Version 0.19.0

Refactored code and reduced number of external dependencies:

• Adjusted a few parameters, ensure they scale correctly with image size
• Using a custom Grid type instead of nalgebra DMatrix
  • Avoid weird conversion between row/column and x/y coordinates
  • Allow for custom optimizations in the future (if needed)
• Replaced wgpu with a lower-level GPU implementation
  • Reduced binary size and number of dependencies
  • Use GPU APIs in the most optimal way possible (e.g. copy data directly to GPU if it shares memory with the host)
  • Precompile & validate shaders during the build, instead of during runtime
  • Keep GPU through the entire process - skip re-loading the Vulkan library
• Reduced image correlation memory usage by 50%
• Tweaked correlation parameters for perspective projection - less data, but higher quality
• Fixed small bugs in GPU shaders implementation
• Fixed vertex color output for OBJ files

Some of the changes might have fixed historical, difficult-to-find bugs and improved overall robustness.