Parallelise compare_images
Parallelise crop
Parallelise save_images
Specify 8 processes for parallel execution
Split Parallel capture jobs down even further
Parallelise thumbnail generation
Increase parallel capture processes
Add parallel runtime dependency to gemspec
Use Parallel.processor_count for processor-intensive tasks
Repeatedly attempt to capture an image upon failure
Reduce save_images to 8 threads - seems to improve stability
Simplify image cropping code
Add fallback image processing, which forces the fallback image to the correct size
Merge pull request #126 from mattsenior/feature/parallel

Parallel execution for performance improvements