DI: added ContainerBuilder::literal()
DI: expand() will expand properties of stdClass objects too
DI\ContainerBuilder: removed support for %param% in DI compiler (BC break!)

See http://forum.nette.org/cs/12881-dependency-injection-v-nette-2-1#p100956
DI\Helpers::escape() removed
Merge pull request #1015 from nette/DI

DI: all parameters are expanded early, removed support for %var% in definitions (BC break!)
Dumper: ability to dump SplObjectStorage [Closes #916]