[Talk-ca] Cleanup of addr:country, addr:province, addr:state

[Matthew Darwin]

So I've tidied up the addr:province/state tags, now using only 
addr:province, leaving anything that would be generally considered 
"correct" either spelt out in full or using English provincial 
abbreviation as you might use in a mailing address. Also left "Quebec" 
(no accent).
I would rather like to clean this up further, however, I have stopped 
just at tidying up things that were mis-spelt or had inconsistent case.

Is there any view on where to go next?

These are the current counts:

69008           Nova Scotia
39668           ON
33280           British Columbia
  7788           Alberta
  6584           AB
  4771           BC
  4520           Québec
  3772           Ontario
  2791           QC
  2140           NB
  1744           SK
  1285           NU
  1066           NL
  1022           Manitoba
   879           New Brunswick
   527           Quebec
   307           PE
   234           NS
   222           MB
   163           Saskatchewan
    23           Nunavut
    14           NT
    11           YT
     9           Yukon
     3           Northwest Territories