i'm proud to present you a component to use SVG vector images in your iOS and Android apps. And next week in your Windows Phone 8.1 and XamForms apps.
Vector images are like text fonts: they resize to any size without any artifact at any resolution, they can have multiple colors and shades, and colors can be remapped easily to other colors (for "material design": buttons states, ...)
SVG files are easy to edit: they are text files. And imaging tools exists: free Inkscape, Illustrator, paint (joking;-) ...
Download it here, from xamarin studio, or from visual studio. Package name: XamSvg.
Hope you'll find it useful.