Update readme

README.md

@@ -40,19 +40,36 @@ Get information about a message
 - `message_id` Message id
 ##### Returns `message`
 
-<!--TODO: Document the following methods:
+ Document the following methods:
 #### Command `getparticipants`
-(todo)
+Get the member list of a supergroup or channel
 ##### Parameters
-- `(todo)`
+- `chat_id` Chat id
-##### Returns `(todo)`
+- `filter` String, possible values are
+    `members`, `parameters`, `admins`, `administators`, `restricted`, `banned`, `bots`
+- `offset` Number of users to skip
+- `limit` The maximum number of users be returned; up to 200
+
+##### Returns `ChatMember`
 
 #### Command `deletemessages`
-(todo)
+Delete all the messages with message_id in range between `start` and `end`.  
-##### Parameters
+The `start` parameter MUST be less than the `end` parameter  
-- `(todo)`
+Both `start` and `end` must be positive non zero numbers  
-##### Returns `(todo)`
+The method will always return `true` as a result, even if the messages cannot be deleted  
+This method does not work on private chat or normal groups
+It is not suggested to delete more than 200 messages per call
 
+**NOTE**  
+The maximum number of messages to be deleted in a single batch is determined by the `max-batch-operations` parameter and is 10000 by default
+
+##### Parameters
+- `chat_id` Chat id
+- `start` First message id to delete
+- `end` Last message id to delete
+##### Returns `true`
+
+<!--TODO:
 #### Command `togglegroupinvites`
 (todo)
 ##### Parameters
@@ -65,6 +82,8 @@ If enabled, allow only relative paths for files in local mode.
 #### Executable flag `insecure`
 Allow http connection in non-local mode
 
+#### Executable parameter `max-batch-operations`
+maximum number of batch operations (default 10000)
 
 <a name="modified-features"></a>
 ### Modified features
@@ -77,6 +96,13 @@ The `message` object now has two new fields:
 - `views`: how many views has the message (usually the views are shown only for channel messages)
 - `forwards`: how many times the message has been forwarded
 
+#### Object `ChatMember`
+The `ChatMember` object now has two new fields:
+- `joined_date`: integer, unix timestamp, when has the user joined
+- `inviter`: `User`, the inviter
+
+In addition, the member list now shows the full bot list (previously only the bot that executed the query was shown)
+
 <a name="installation"></a>
 ## Installation