update some links to point to getcomposer.org

res/composer-schema.json

@@ -35,7 +35,7 @@
         },
         "version": {
             "type": "string",
-            "description": "Package version, see http://packagist.org/about for more info on valid schemes."
+            "description": "Package version, see http://getcomposer.org/doc/04-schema.md#version for more info on valid schemes."
         },
         "time": {
             "type": "string",

src/Composer/Command/AboutCommand.php

@@ -37,7 +37,7 @@ EOT
         $output->writeln(<<<EOT
 <info>Composer - Package Management for PHP</info>
 <comment>Composer is a package manager tracking local dependencies of your projects and libraries.
-See http://packagist.org/about for more information.</comment>
+See http://getcomposer.org/ for more information.</comment>
 EOT
         );
 

src/Composer/Factory.php

@@ -46,7 +46,7 @@ class Factory
             } else {
                 $message = 'Composer could not find the config file: '.$composerFile;
             }
-            $instructions = 'To initialize a project, please create a composer.json file as described on the http://packagist.org/ "Getting Started" section';
+            $instructions = 'To initialize a project, please create a composer.json file as described in the http://getcomposer.org/ "Getting Started" section';
             throw new \InvalidArgumentException($message.PHP_EOL.$instructions);
         }