Moved icons into images/icons directory
* www/style.css: 
* www/compatibility.html: 
* www/index.html: 
* www/modes.html: use modified icon path
* www/images/icons: new directory for icons files
* www/images/icons/contact.png: renamed from images/contact.png 
* www/images/icons/contact.svg: renamed from images/contact.svg 
* www/images/icons/development.png: renamed from
  images/development.png
* www/images/icons/development.svg: renamed from
  images/development.svg
* www/images/icons/download.png: renamed from images/download.png 
* www/images/icons/download.svg: renamed from images/download.svg 
* www/images/icons/email-link.png: renamed from images/email-link.png
* www/images/icons/external-link.png: renamed from
  images/external-link.png
* www/images/icons/info.png: renamed from images/info.png 
* www/images/icons/info.svg: renamed from images/info.svg 
* www/images/icons/network.png: renamed from images/network.png
* www/images/icons/network.svg: renamed from images/network.svg 
* www/images/icons/package.png: renamed from images/package.png 
* www/images/icons/package.svg: renamed from images/package.svg