[V3] Data Converter (#1293)

* More docstrings

* still not ready...

* push this untested pile of code.

* working, menu needs cleaning up though, modlog converter not here yet

* menu cleanup

* add note about the fact that values are overwritten

* add i18n

* User friendlier quitting

* Better naming of a function

* setup automodule for dataconverter

* More documentation

* use Config.MEMBER (etc) instead of 'MEMBER' (etc)

redbot/cogs/dataconverter/locales/regen_messages.py

@@ -0,0 +1,15 @@
+import subprocess
+
+TO_TRANSLATE = [
+    '../dataconverter.py'
+]
+
+
+def regen_messages():
+    subprocess.run(
+        ['pygettext', '-n'] + TO_TRANSLATE
+    )
+
+
+if __name__ == "__main__":
+    regen_messages()