Add terms of service and privacy policy for discord bot

factorion-bot-discord/PRIVACY.md

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+# Privacy Policy
+## Working Data
+To be able to find and answer to factorials, the bot reads all messages in the channels it is active in.
+
+The message content is not stored if the server is configured correctly.
+This is due to the discord client framework, we use, which logs all Events.
+The official bot `factorion-bot` with the id `1425936019559153847`, is configured to supress these logs.
+
+## Stored Data
+Channel configuration, which inludes pre-set commands and locale, is saved.
+Additionally for development, debugging and statistical purposes, some information is logged and permanently saved.
+
+This information is saved, when factorion finds operations (factorials or similar):
+  - comment author name
+  - message and channel id
+  - the calculations which include:
+    - the parsed numbers and operations
+    - the calculated result
+  - some status information which includes:
+    - whether factorion replied
+    - whether some operation could not be calculated
+  - which commands were applied (set by user or configured for channel)
+  - which locale was used
+
+This information may be saved on errors:
+  - message and channel id
+  - information from comment excluding comment text.
+
+This information may be saved for any comment:
+  - time the message was recieved
+  - time taken to parse, calculate and format individually
+
+## Shared Data
+Some statistics may be shared with the public.
+
+Such statistics may include:
+  - time taken for parsing, calculation and formatting
+  - channel ids with number and time of factorials
+  - author names with number of factorials
+  - calculation statistics wich may include (anonymously) all information regarding individual calculations as defined above
+  - (anonymous) command statistics

factorion-bot-discord/TERMS.md

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+# Terms of Service
+## Definitions
+In the following, these words will be definied as follows.
+- We refers to the operators of `factorion-bot`.
+- Admin refers to a Discord server admin using `factorion-bot` on that server.
+- User refers to a Discord user commenting in channels `factorion-bot` is installed. 
+
+## Rights and Responsibilities
+### Proper Usage
+An Admin MUST have permission of the Discord server owner to install `factorion-bot` on that server.
+
+An Admin MUST reasonably inform Users, that `factorion-bot` is active in a channel and what that entails.
+
+An Admin MAY install and configure `factorion-bot` in channels.
+
+An Admin or User MUST have permission of the Discord server owner to configure `factorion-bot`,
+in particular to change the locale, which may result in unwanted language used by `factorion-bot`.
+
+A User MUST follow the Discord server rules, in particular regarding spam, interacting with and triggering `factorion-bot`.
+
+### Privacy
+Our Privacy Policy can be found [here](PRIVACY.md).
+
+## Liability
+`factorion-bot` as a free service is provided "AS IS". Other than as stated in these terms, We make no warranties, express or implied.
+
+We are especially not liable for any damages incurred through improper use of `factorion-bot`.
+
+## Changes
+These Terms may change in the future. In such a case We will attempt to inform Admins. However it is recommended to check for updates regularly.