Force to UTF8 encoding at startup

Fixes BotBotMe/botbot-bot#37

Author: ipmb

.env.example

@@ -9,6 +9,10 @@ REDIS_PLUGIN_STORAGE_URL=redis://localhost:6379/0
 REDIS_PLUGIN_QUEUE_URL=redis://localhost:6379/1
 PUSH_STREAM_URL=http://localhost:8080/pub/?id={id}
 
+# Set encoding if the system hasn't done it properly
+LANG=en_US.UTF-8
+PYTHONIOENCODING=utf8
+
 # Optional
 # MEMCACHE_URL=127.0.0.1:11211
 # STATIC_ROOT=/var/www/botbot/static