Add localization system (gettext)

translations/tools/update_pot.sh

@@ -1,4 +1,12 @@
 #!/bin/bash
 
 cd $(dirname $0)/..
-xgettext -d toxic -o toxic.pot ../src/*
+v=$(grep TOXIC_VERSION ../cfg/global_vars.mk | head -1 | cut -d "=" -f 2 | tr -d " ")
+xgettext --default-domain="toxic" \
+	--from-code="UTF-8" \
+	--copyright-holder="Toxic Team" \
+	--msgid-bugs-address="JFreegman@tox.im" \
+	--package-name="Toxic" \
+	--package-version="$v" \
+	--output="toxic.pot" \
+	../src/*