message: Update doxygen to better reflect reality
diff: @@ -216,12 +216,12 @@ public:
  *******************************************************************************
  * \brief Gets a value of arbitrary type out of the datastore
  *
  - * Retrieves a value of user-defined type, i.e., not double, int, bool, or string.
  + * Retrieves a value of primitive or user-defined type.
  *
  * \param [in] name The name of the subtable representing the root of the object
  * \return The retrieved value
  * \tparam The type to retrieve
  - * \pre Requires a specialization of FromInlet<T>
  + * \pre Requires a specialization of FromInlet<T> for user-defined types
  * \note This function does not indicate failure in a way that can be handled
  * by a program - if an object of requested type does not exist at the specified
  * location, the program will terminate
  