Issue #1781826 by rszrama: fix a couple of issues pertaining to menu rebuilding, including the use of an inconsistent variable name and a direct call to menu_rebuild().
Issue #1751124 by pcambra, rszrama: always reset line item types when a product line item type is saved and change the menu rebuild method to the variable based method used by Commerce instead of calling menu_rebuild() directly.
Issue #1732696 by bojanz: improve the API to support Features by adding an actual API function to load customizable product line item types and the ability to skip line item type configuration and reset on the insert of new customizable product line item types.
Issue #1463942 by rszrama: remove a copy/paste error that referenced a Tax module function and put the appropriate Customizable Product module function call in its place.
Issue #1369606 by rszrama: call the field attach functions for creating and deleting bundles and move around menu item rebuilding to properly reset menu items when these events happen.
