Add README

README.md

@@ -0,0 +1,17 @@
+# etecal
+
+Command line utility using [etebase protocol](https://etebase.com/) for interacting with [EteSync](https://www.etesync.com/) calendars.
+
+```
+Usage: etecal [OPTIONS] [COMMAND]
+
+Commands:
+  login      Login with user account
+  calendars  Display available calendars
+  help       Print this message or the help of the given subcommand(s)
+
+Options:
+      --config <CONFIG>  Path to config directory
+  -h, --help             Print help
+  -V, --version          Print version
+```