Revised readme file and added screenshot...

.gitignore

@@ -0,0 +1 @@
+xighlight

README.md

@@ -16,13 +16,11 @@ Install:
 $ sudo sh install.sh
 ```
 
-Testing:
-```bash
-$ sh example/testing.sh
-```
-
 Use:
 ```bash
-$ cat my_c_program.ext | xighlight
-$ xighlight < my_c_program.ext
+$ xighlight my_program.ext                   -- "This way, language is selected by the extension."
+$ cat my_program.ext | xighlight [extension] -- "You need to specify the language, check -h / --help."
+$ xighlight [extension] < my_program.ext     -- "Again, since it's reading from standard stream..."
 ```
+
+![screenshot](screenshot.png)