rm alias for remove

README.md

@@ -100,7 +100,7 @@ $ rnote list --category
 It will prompt you to enter category name.
 
 ### Remove notes
-`rnote remove` can be simplified by `rnote r`.\
+`rnote remove` can be simplified by `rnote r` or `rnote rm`.\
 To delete a note, you can simply type:
 ```
 $ rnote remove

src/rnote/app.rs

@@ -25,6 +25,7 @@ pub fn make_app() -> App<'static, 'static> {
         .subcommand(
             SubCommand::with_name("remove")
                 .alias("r")
+                .alias("rm")
                 .about("Remove a note.")
                 .arg(Arg::with_name("header").help("Name of the note."))
                 .arg(