Installing RMagick with Imagemagic on Windows 7/Vista

From : https://github.com/rmagick/rmagick/issues/27
Thanks to :  https://github.com/wingfire

Working with Windows 7 64bit and Ruby 1.9.3.

1. Install Ghostscript
http://downloads.sourceforge.net/project/ghostscript/GPL%20Ghostscript/9.05/gs905w32.exe

2. Install Imagemagick
Use the 32 bit version, 64bit is not working.
http://www.imagemagick.org/download/binaries/ImageMagick-6.7.6-1-Q16-windows-dll.exe (2012-03-22)
Install dev headers (Check!)
Install into C:\opt\

3. Restart the console/cmd prompt/IDE/.. or just restart windows to make Imagemagick commands available

4. Install rmagick
gem install rmagick --platform=ruby -- --with-opt-lib=C:/opt/ImageMagick-6.7.6-Q16/lib --with-opt-include=c:/opt/ImageMagick-6.7.6-Q16/include