add flake8
eliminate UnicodeWriter, used only in spreadsheet task
import unicode_literals consistently
update fed license url
update ab strathcona county source url
update ab source, license, data
update ns halifax source, license, data
update sk regina license
remove autopep8 readme
fix link to fed license
update fed ed-next data url
update ab calgary source, license data urls
update fed source url
comment out ab data url
update strathcona shapefile
fix link to ab license
update license constants, indentation
relax flake8 rules
indentation
update ab calgary data