Move hooks calls a little higher.

Where they were in the API, modifications triggering other modifications were
causing old data to be used, so the second (and later) modifications would fail
due to "locking"... We now allow modifications to complete to the point where they
update the lastModifiedDate on instances of Tuque objects before invoking our hooks.
Resolve issue with recursing. Curse you, PHP!
Merge pull request #524 from adam-vessey/7.x-USDA-65

Move hooks calls a little higher.