🌐 Add Makefile to run the tasks easily (#11)

Makefile with four instructions: extract, init, update and compile. This makes easier to run the necessary tasks to work with the translations.

Makefile

@@ -0,0 +1,19 @@
+help:
+	@echo "Makefile to ease the translation process"
+	@echo "Usage:"
+	@echo "      make extract			Extract message strings."
+	@echo "      make init lang=LANG_CODE		Create catalog (po file)."
+	@echo "      make update			Extract and update po files."
+	@echo "      make compile			Compile po files to mo files."
+
+extract:
+	pybabel extract --mapping babel.cfg --output messages.pot ./
+
+init:
+	pybabel init --input-file translations/messages.pot --output-dir translations/ --locale $(lang) --domain messages
+
+update:
+	pybabel update --input-file messages.pot --output-dir translations/ --domain messages
+
+compile:
+	pybabel compile --directory translations/ --domain messages