Update readme to contain new interval parameter.

Improve examples.
[skip ci]

Author: noplanman

README.md

@@ -53,32 +53,48 @@ a         | **a**ction: The actual action to perform. (handle (default), set, un
           | **handle** executes the `getUpdates` method; **set** / **unset** / **reset** the Webhook.
 l         | **l**oop: Number of seconds to loop the script for (used for getUpdates method).
           | This would be used mainly via CLI, to continually get updates for a certain period.
+i         | **i**nterval: Number of seconds to wait between getUpdates requests (used for getUpdates method, default: 2).
+          | This would be used mainly via CLI, to continually get updates for a certain period, every **i** seconds.
 
 #### via browser
 
 Simply point your browser to the `manager.php` file with the necessary **GET** parameters:
 `http://example.com/manager.php?s=<secret>&a=<action>&l=<loop>`
 
-*e.g.* Set the webhook:
+**Webhook**
+Set, unset and reset the webhook:
 `http://example.com/manager.php?s=super_secret&a=set`
+`http://example.com/manager.php?s=super_secret&a=unset`
+`http://example.com/manager.php?s=super_secret&a=reset` (unset & set combined)
 
-*e.g.* Handle updates for 30 seconds:
-`http://example.com/manager.php?s=super_secret&a=handle&l=30` or simply
-`http://example.com/manager.php?s=super_secret&l=30` (`handle` action is the default)
+**getUpdates**
+Handle updates once:
+`http://example.com/manager.php?s=super_secret&a=handle` or simply
+`http://example.com/manager.php?s=super_secret` (`handle` action is the default)
+
+Handle updates for 30 seconds, fetching every 5 seconds:
+`http://example.com/manager.php?s=super_secret&l=30&i=5`
 
 #### via CLI
 
 When using CLI, the secret is not necessary (since it could just be read from the file itself).
 
 Call the `manager.php` file directly using `php` and pass the parameters:
-`$ php manager.php a=<action> l=<loop>`
+`$ php manager.php a=<action> l=<loop> i=<interval>`
 
-*e.g.* Set the webhook:
+**Webhook**
+Set, unset and reset the webhook:
 `$ php manager.php a=set`
+`$ php manager.php a=unset`
+`$ php manager.php a=reset` (unset & set combined)
+
+**getUpdates**
+Handle updates once:
+`$ php manager.php a=handle` or simply
+`$ php manager.php` (`handle` action is the default)
 
-*e.g.* Handle updates for 30 seconds:
-`$ php manager.php a=handle l=30` or simply
-`$ php manager.php l=30` (`handle` action is the default)
+Handle updates for 30 seconds, fetching every 5 seconds:
+`$ php manager.php l=30 i=5`
 
 ### Create the manager PHP file