refactor: add note about authentication password

.travis.yml

@@ -1,7 +1,11 @@
 language: php
+
 php:
-  - "5.4"
-  - "5.5"
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
 
 before_script:
   - sudo apt-get update -qq

README.md

@@ -31,6 +31,12 @@ Add php-torcontrol to your `composer.json`:
 Usage
 -----
 
+When using `password authentication` while controlling TOR, the password must be generated using the command:
+`~> tor --hash-password "random_password"`
+which will generate a `hashed password` beginning with `16:DEE07A96....` (just an example).
+This `hashed password` must be inserted in `/etc/tor/torrc`:
+`HashedControlPassword 16:DEE07A96....`
+
 ```php
 <?php
 
@@ -42,7 +48,8 @@ $tc = new TorControl\TorControl(
     array(
         'hostname' => 'localhost',
         'port'     => 9051,
-        'password' => 'MySecr3tPassw0rd',
+        'password' => 'random_password',
+        // the original password not the hashed one
         'authmethod' => 1
     )
 );
@@ -56,10 +63,6 @@ $res = $tc->executeCommand('SIGNAL NEWNYM');
 
 // Echo the server reply code and message
 echo $res[0]['code'].': '.$res[0]['message'];
-
-// Quit
-$tc->quit();
-
 ```
 
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