application name validation

template.js

@@ -24,6 +24,8 @@ exports.warnOn = '*';
 
 // The actual init template.
 exports.template = function(grunt, init, done) {
+  init.prompts.name.validator= /^[A-Z][A-Za-z0-9]*$/;
+  init.prompts.name.warning= 'Must be a valid class name: only alphanumeric and starting with an uppercase letter!';
 
   init.process({type: 'amber'}, [
     // Prompt for these values.