Testing Done:
Deleted the old `blist.xml` from my `XDG_CONFIG_HOME` and verified that I only got the new contacts and verified that they were not stored back to `blist.xml`.
Reviewed at https://reviews.imfreedom.org/r/2432/
# UPDATING VERSION NUMBERS FOR RELEASES
#
# The version number is:
# <major>.<minor>.<micro><extra>
#
# micro += 1
#
# If any functions have been added to libpurple, Pidgin, or Finch:
# micro = 0
# minor += 1
#
# If backwards compatibility has been broken in libpurple, Pidgin, or Finch:
# micro = 0
# minor = 0
# major += 1
# purple_soversion += 1
#
# extra should be similar to one of the following: