dahlia/wand — pull request #53 by wronglink (2012-09-06 19:39:48+00:00)
Title: Added blank image creation functionality to Image constructor

Sometimes it can be useful not to open image (from file or create it from blob) but to create a new blank image. An ImageMagick supports a [MagickNewImage](http://www.imagemagick.org/api/magick-image.php#MagickNewImage) method.
I've added new parameters for blank image creation to `wand.image.Image` constructor.
Now, if no opening arguments (`image`, `blob`, `file` or `filename`) given it will create a new blank image specified by `width`, `height` and optional `background` parameters.
Tests included.