There's not much to say here. This allows dispensers to place blocks.
It handles rotations properly (vanilla ones at least). There's also a blacklist to make sure some blocks aren't dispensable.
Any blocks that already have a dispensing behaviour (like TNT) aren't included.
If you have any problems with the mod or just want to contact me, you can find me on Twitter (@Vazkii) or IRC (#vazkii on irc.esper.net).