#179 Image implementation

[James Pether Sörling]

Would it possible to add an another constructor on Image(String filename, int width, int height, ImageInfo.Format format) that creates an Image with ImageInfo without verifying the image and set passed in values.

Would help to get rid of one extra read of the image from the database in my case where i direct to a servlet feeding images.

[James Pether Sörling]

Image patch for above behavior