This patch adds support for loading [classname] from classname/classname.pd to match classname/classname.pd_linux support, which has been around a long time and proven quite useful. The patch adds classname/classname.pd as the last thing to try in the whole loading sequence, so it should not break anything, unless it is relying on the failure of an object to create.
One example this patch supports is the [arduino] object, which is implemented as an abstraction. With this patch, everything can be included in a folder called "arduino/" from the help patch, the meta file, and the abstraction itself. This makes installation trivial, just drop the arduino folder in the right place, and also makes the arduino folder show up in the Help Browser.