Added README

README.md

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+# Bar weather
+
+Simple tool written in Rust to query weather
+
+# Description
+
+* Tool uses weather.gov API to query weather
+
+# Usage
+
+* Use the `--help` option for usage information:
+
+```sh
+Usage: bar_weather [OPTIONS]
+
+Options:
+  -s, --station <STATION>  Name of the weather station [default: khio]
+  -m, --metric             Use Metric units. Imperial units otherwise
+  -h, --help               Print help
+  -V, --version            Print version
+```