Allow for Bindings to be attached to elements before they enter the document. The `attached` callback will be called, but not the `enteredDocument` callback. When applying binding rules to a tree that has entered the document, elements are checked for bindings that have been pre-attached - the pre-attached bindings only have their `enteredDocument` callback called.
Allow for Bindings to be attached to elements before they enter the document.
The `attached` callback will be called, but not the `enteredDocument` callback.
When applying binding rules to a tree that has entered the document,
elements are checked for bindings that have been pre-attached -
the pre-attached bindings only have their `enteredDocument` callback called.

meekostuff/DOMSprockets,meekostuff/DOMSprockets