Fix warning and add README

README.md

@@ -1,2 +1,18 @@
 # lasy-cli
 
+# How to install
+
+1. Visit https://rustup.rs/ and follow instructions to install Rust
+2. Run: `$ cargo install --git https://git.interhacker.space/lle-bout/lasy-cli.git --force`
+
+# How to use
+
+For example with <https://git.interhacker.space/teamlaser/LJ>:
+
+`$ python clitools/generators/tunnel.py | clitools/filters/kaleidoscope.py | lasy-cli`
+
+And it will print optimized points in the same format.
+
+# How to update with latest changes from this repo
+
+Re-run step 2 of installation

src/main.rs

@@ -1,7 +1,7 @@
 use std::{hash::Hash, hash::Hasher, io};
 
 use anyhow::Result;
-use clap::{app_from_crate, crate_authors, crate_description, crate_name, crate_version, App, Arg};
+use clap::{app_from_crate, crate_authors, crate_description, crate_name, crate_version, Arg};
 use io::Write;
 use lasy::{
     euler_graph_to_euler_circuit, interpolate_euler_circuit, point_graph_to_euler_graph,