support for CMYK JPG images with external CMYKDemo.jar added

I have prepared support for CMYK JPG by adding extra .jar with part of Monte Media Library  - http://www.randelshofer.ch/monte/ Some details about it can be found here: http://www.randelshofer.ch/blog/2011/08/reading-cmyk-jpeg-images-with-java-imageio/

It fixes #2 issue - a long waiting one.

Hope @enebo you would like it and also add to **image_voodoo** :-) 

Sadly I didn't written any tests because I couldn't get small enough for adding to Git repo CMYK JPG file. Some testing file you can find here: [link to CMYK-like JPG image](http://f.cl.ly/items/0q46190F0K3Q3y2H1Q0M/5053a01l.jpg).