Backported vanilla commit 67b3095a by Ant1r: Fix the way signal scalars are searched into the list of inlets of an object.

Backported the changes in m_obj.c from vanilla commit 7e29725 by millerpuckette; these fix the problem with secondary signal inlets not working without a main signalin.

fixed old bug that I somehow missed (thanks to Roman for the report). See http://sourceforge.net/tracker/index.php?func=detail&aid=1936157&group_id=55736&atid=478072 for more info...

major overhaul of existing undo actions to conform to the infinite undo format, changed how undo create functions, started undo recreate, reformatted undo index, a number of minor bug fixes, implemented undo actions index 1,2,4,5, and 9 and started working on 10.