Add some FIXMEs
Move the legacy resources into the `legacy` folder
Fix two issues with the autoload collection class
Rename `$ordered` to `$bundlesMap` and remove the legacy module ignores
Do not limit the `autoload.json` search to the second level
Refactor the `Collection::addLegacyBundle()` method
Refactor the bundle autoloading
Fix a few issues with the refactored autoloader
Refactor the bundle autoloading (part 2)
Further refactor the bundle autoloading
Enable doctrine database connection.