Update iso-codes to 3.64:

iso-codes 3.64
--------------
Dr. Tobias Quathamer <toddy@debian.org>
Sun, 3 Jan 2016

  [ ISO 3166-2 translations ]
  * Thai by Theppitak Karoonboonyanan
  * Fixed Russian translation of "Egypt". Thanks to Aleksandr Sorokin
    Closes: alioth#315251
  * Serbian by Мирослав Николић (TP)

  [ ISO 15924 translations ]
  * Thai by Theppitak Karoonboonyanan

  [ ISO 4217 translations ]
  * Russian by Yuri Kozlov (TP)
  * Slovenian by Primož Peterlin (TP)
  * Serbian by Мирослав Николић (TP)

  [ ISO 3166 translations ]
  * Fix Language headers. Thanks to Hugo Peixoto
    Closes: alioth#315269
  * Serbian by Мирослав Николић (TP)

(wiz)