Another bugfix: sometimes, very early during execution, a class with namespaces might not be autoloaded yet, and if we are asked to load the old class without namespaces, it will fail. Make it load the file corresponding to the class first, and see if it exists then. If not, try to see if it has been migrated to namespaces, and create the alias then.

Bugfix: don't try to log anything before creating a class alias, as the logger itself might be subject to an alias.

Add a temporary autoloader that allows loading old classes (SimpleSAML_Path_Something) that have already migrated to namespaces (SimpleSAML\Path\Something), while logging a warning. This commit requires to regenerate the composer autoloader with ./composer.phar dump-autoload.

Make the module autoloader to register class aliases for the classes that are migrated to namespaces, so that they are still accessible via the old name. This keeps everything working while migrating the classes.

Add a PSR-4 autoloader for modules. Now modules can declare their classes under the SimpleSAML\Module namespace.

This patch also starts using Composer for other dependencies
(i.e. php-openid and xmlseclibs).

Thanks to Boy Baukema for implementing this!

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3290 44740490-163a-0410-bde0-09ae8108e29a