BUG FIX - bad filepath for autoload in composer.json

Signed-off-by: Jan Pecha <janpecha@email.cz>
Tests: updated Nette\Tester

Signed-off-by: Jan Pecha <janpecha@email.cz>
Bug fix - missing support for "use NS1; use NS2; ...", missing USE reset

Signed-off-by: Jan Pecha <janpecha@email.cz>
Tests: added test for more namespaces in one file

Signed-off-by: Jan Pecha <janpecha@email.cz>