now works with latest version of handlebars

handlebars.object_helpers.js

// HELPER: #key_value
//
// Usage: {{#key_value obj}} Key: {{key}} // Value: {{value}} {{/key_value}}
//
// Iterate over an object, setting 'key' and 'value' for each property in
// the object.
Handlebars.registerHelper( "key_value", function ( obj, options ) {
    
    var buffer = "",
        key;

    for ( key in obj ) {
        
        if ( obj.hasOwnProperty( key ) ) {
            
            buffer += options.fn({ 
                key: key, 
                value: obj[ key ] 
            });
        }
    }

    return buffer;
});