amberc: new executable based on amberc.js

bin/amberc

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+var amberc = require('./amberc.js');
+amberc.main();

bin/amberc.js

@@ -1,4 +1,3 @@
-#!/usr/bin/env node
 /**
  * This is a "compiler" for Amber code.
  * Create and run it the following way:
@@ -740,6 +739,3 @@ AmberC.prototype.closure_compile = function(sourceFile, minifiedFile, callback)
 };
 
 module.exports = new AmberC();
-
-var amberc = new AmberC();
-amberc.main();