Prevent word duplication when appending to an object
Fix CC#1979
Optimize the code to not use search
Correct 'self handling
Ammend a couple of frame creation functions to use bare series for word lists.
Amend Init_Frame_Word to set OPTS_UNWORD option to the word added to the frame word list.
Rebased on Collect_Obj fix to not cause crashes in 64-bit R3