Drop PHP 5.3 support
Update .gitattributes per new location for classes.
Remove AT class.
Less files in project root directory.
No more AT::getExpressionLanguage.
New location for our namespace.
No ./lib/ dir on git export.
Drop typed data feature.
Format code in RouteToMenu class.
Rename *.inc -> *.php
New namespace for hook implementations.
No more breadcrumb_api service.
Format Container class.
Remove typed data services.
Cleanup ModulesFetcher class.
Rename ModulesFetcher to ModuleFetcher.
Add AT::getModuleFetcher().
Add Helper class.