Statistics Canada recently released its yearly list of changes to municipal boundaries, status, and names.  You can find it at this URL:

http://www5.statcan.gc.ca/bsolc/olc-cel/olc-cel?catno=92f0009x&lang=eng

The latest list is available in XLSX and TXT formats.

Historical tables of changes to municipal boundaries are located at this URL:

http://www5.statcan.gc.ca/bsolc/olc-cel/olc-cel?catno=92F0009X&chropg=1&lang=eng