add flags for ukraine, belarus, kosovo

Removed Ukraine and Belarus from the list of countries we're not using. Also compressed flag for Turkey
Added a separate settings_production.py file that gets imported if env variable ENVIRONMENT is set to production
modify test test_edit_event_with_image to test if the old event picture is getting deleted
Merge remote-tracking branch 'upstream/master'
remove empty strings at the end of the file
forgot to import os
Merge pull request #321 from Konviser/master

modify test test_edit_event_with_image to test if the old event picture is getting deleted
Added check if ENVIRONMENT variable is actually set before reading it
preparing to add kosovo as country
Merge pull request #320 from goranche/split-server-env

Added a separate settings_production.py file
Merge pull request #322 from ialja/master

Add Belarus and Ukraine, preparing to add Kosovo