Updated Users (markdown)

Users.md

@@ -12,6 +12,7 @@ Press ```Add``` button in the main window to open user creation form.
 	- SomeUserName
 - ```Friendly name``` - if set up then this name will be shown in the users list instead username.
 - ```Reddit/Twitter``` - site pointers.
+- ```Channel``` - profile is subreddit
 - ```Temporary``` - user will be shown at ```Temporary``` group.
 - ```Favorite``` - user will be shown at ```Favorite``` group.
 - ```Download images/videos``` - for the created user only the selected media types will be downloaded