Updated README with initial information

README.md

@@ -1,3 +1,22 @@
-# unibar
+# Unibar
 
-A tool that returns variety of components in a string suitable to use in a status bar
+Simple bar written in Rust
+
+# Description
+
+* A tool that returns variety of components in a string suitable to use in a
+  status bar
+
+# Usage
+
+* Use the `--help` option for usage information:
+
+```sh
+Usage: unibar [OPTIONS]
+
+Options:
+  -s, --weather_station <STATION>  Name of the weather station [default: khio]
+  -m, --weather_metric             Use Metric units. Imperial units otherwise
+  -h, --help               Print help
+  -V, --version            Print version
+```