Added readme

README.md

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+# TU
+
+Time's Up!
+
+## About
+
+Time's Up! is a small application that will let you control how long you have
+till it is up to an event.
+
+For example, if today is 07-May and you set an event for 22-May, it should
+tell you that you have 15 days up to it.
+
+## Commands
+
+* Adding new events: `tu add YYYY-MM-DD 'description'`
+	* Optional: set a time for the event: `tu add YYYY-MM-DD 'description' --time HH:MM`
+* Listing events: `tu`
+* Removing events: When you add an event, it will show up a small code for
+	that event; you can remove it with `tu rm EVENTID`
+
+## TODO
+
+- [ ] Add unique identifier for each event
+- [ ] Removing events
+- [ ] Replace `dbg!` with [env_logger](https://crates.io/crates/env_logger)
+	(reasoning: Although `dbg!` is nice and dandy, it can't be disabled, and
+	that's bad UI)
+
+## License
+
+GNU AFFERO GENERAL PUBLIC LICENSE, Version 3.