Add an option to print the output in AMD style

[kadishmal]

Original Handlebars supports AMD style output using --amd or -a options used like:

handlebars -a -m -e hb ./js/photos > ./js/photos/templates.js

Since my entire application is based on Require.js, I need AMD compliant compiled templates.

All that is required is to wrap the current output with:

define(["Ember"],function(Ember){
    // Current output goes here.
});

I think it should be fairly simple to add this feature. Please let me know if it has already been added.

[dgeb]

This is now supported because of PR #35 - thanks @kadishmal!