add readme and license

LICENSE.md

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+# The Chaos License (GLP)
+
+This software is released under the terms of the Chaos License. In cases where the terms of the
+license are unclear, refer to the [Fuck Around and Find Out
+License](https://git.sr.ht/~boringcactus/fafol/tree/master/LICENSE-v0.2.md).

README.md

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+# Katabastird: a simple countdown timer
+
+Katabastird is a simple countdown timer that is configured and launched from the commandline.
+
+``` text
+Usage: katabastird [OPTIONS]
+
+Options:
+      --hours <HOURS>      Hours to count down [default: 0]
+  -m, --minutes <MINUTES>  Minutes to count down [default: 0]
+  -s, --seconds <SECONDS>  Seconds to count down [default: 0]
+  -a, --alarm <ALARM>      Audio file to play at the end of the countdown
+  -r, --running            Begin countdown immediately
+  -u, --count-up           Count up from zero, actually
+  -p, --predator           Use the Predator font
+  -h, --help               Print help information
+  -V, --version            Print version information
+```
+
+![a Predator's view of the timer while it's paused](./predator_timer_small.png)