Merge branch 'readme-flag' into 'master'

added flag

See merge request mhart/DancingDroids!69

README.md

@@ -15,6 +15,7 @@ You can find more information in the [subject](https://framagit.org/mhart/Dancin
  -h, --help            Prints help information
  -V, --version         Prints version information
  -w, --random-world    Generate random world
+ -r, --random 	       Generate random world with random robots
  -f, --file <file>     Configuration file
 ```
 ## Authors

src/main.rs

@@ -216,7 +216,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                 .short("r")
                 .long("random")
                 .takes_value(false)
-                .help("Generate random world"),
+                .help("Generate random world with random robots"),
         )
         .get_matches();