add TODO

TODO.md

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+# TODO
+
+## Manage avatars
+
+* role is missing
+* avatar deletion and pruning of unused avatars
+
+## Payouts
+
+* roleCanPayInvoice means, the user can recharge user funds by paying an
+    invoice with his own money.
+* roleCanPayOut is the only permission acutally able to remove money from the
+    cashier.
+    
+## Journal
+
+* Journal can only be viewed by every authenticated user using PrimaryPass or
+    ChallengeResponse -> DONE
+
+## Questions
+
+* There is a role overview with which users are in which roles
+
+## Imprint
+
+* Freetext field Markdown as Setting (CanManageSettings)
+
+## Suppliers
+
+* Freetext field for contact info
+
+## Settings
+
+* move currency and registration block from config to settings
+* Add setting for decimal places (default: 2)
+
+## Products
+
+* Add keywords to products (alcohol, caffeine, whatever)