Added Cordova 1.5 support March 2012 - @RandyMcMillan
• You will need to add MessageUI.framework to your project if it is not already included.
• Just add the EmailComposer.h EmailComposer.m files to your Plugins Folder.
• Place the EmailComposer.js file in your app root, and include it from your html.
• Add to Cordova.plist Plugins: key EmailComposer value EmailComposer
• This is intended to also demonstrate how to pass arguments to native code using the options/map object.
• Please review the js file to understand the interface you can call, and reply with any questions.
Cordova.exec(null, null, "EmailComposer", "showEmailComposer", [args]);