Add mini_magick gem
Choose size of the image by passing :width and :height options
Allow use of :width and :height options on SampleFile::Image#file_path
Use instances so the methods don't require that many args
Make better use of ivars in path_to_image (no more args required)
Cleanup SampleFile::Image
Remove duplication from SampleFile spec
Include examples of images with a set width and height.
Create square image if only width or height is given
Bump version to 0.1.0
Merge branch 'feature/resize-image'