CxImag's link is no longer valid

CxImag's link is no longer valid

Author: MambaWong

README.md

@@ -408,7 +408,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 
 * [Boost.GIL](http://www.boost.org/doc/libs/1_56_0/libs/gil/doc/index.html) - Generic Image Library.
 * [CImg](http://cimg.eu/) - A small, open source, C++ toolkit for image processing. [Own LGPL or GPL]
-* [CxImage](http://www.xdp.it/cximage.htm) - An image processing and conversion library to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images. [zlib]
+* [CxImage](https://www.codeproject.com/Articles/1300/CxImage) - An image processing and conversion library to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images. [zlib]
 * [FreeImage](http://freeimage.sourceforge.net/) - An open source library that supports popular graphics image formats and others as needed by today's multimedia applications. [GPL2 or GPL3]
 * [GD](https://github.com/libgd/libgd) - GD Graphics Library, famously used in PHP for image loading/manipulation & thumbnail generation. [custom permissive license, requires mention in user docs] [website](http://libgd.github.io/)
 * [DCMTK](http://dicom.offis.de/dcmtk.php.en) - DICOM Toolkit.