Added documentation for Room Configuration feature (#134)

* Documentation for Room Configuration feature

* Added documentation for Room Configuration feature

Author: etiennevvv

_posts/2019-04-15-gl-admin.md

@@ -292,6 +292,20 @@ To allow the users to create as many rooms as they would like, select the option
 
 ![Greenlight Administrator Room Limit](/images/greenlight/admin_room_limit.png)
 
+## Room Configuration
+
+Through the Room Configuration tab Administrators are able to edit room settings for their site. For currently enabled room settings, users are allowed to edit room settings as they like (defaulted to **Optional**). However, if a room feature was removed through the `.env` file, it is defaulted to **Disabled**.
+
+**Note:** Room setting changes will not apply to currently running/active meetings.
+
+For each room setting, there are 3 options.
+
+**Always Enabled:** Setting is forced on for all rooms. Room owners can not disable this setting.<br>
+**Optional:** Room owner has the option to either enable or disable the setting.<br>
+**Disabled:** Room setting does not appear when creating a room. Room owners can not enable this setting.
+
+![Greenlight Administrator Room Configuration](/images/admin_room_configuration.png)
+
 ## User Roles
 
 Through the Roles tab Administrators are able to edit the roles for their site.

_posts/2019-04-15-gl-overview.md

@@ -96,7 +96,7 @@ Your new room will then show under your current room, and you can click to switc
 | Mute users when they join                 | Automatically mutes the user when they join the BigBlueButton meeting                                                                                                                                                               |
 | Require moderator approval before joining | Prompts the moderator of the BigBlueButton meeting when a user tries to join. If the user is approved, they will be able to join the meeting.                                                                                       |
 | Allow any user to start this meeting      | Allows any user to start the meeting. By default, only the Room Owner will join as a moderator.                                                                                                                                     |
-| All users join as moderators              | Gives all users moderator priveleges in BigBlueButton when they join the meeting.                                                                                                                                                   |
+| All users join as moderators              | Gives all users moderator privileges in BigBlueButton when they join the meeting.                                                                                                                                                   |
 | Automatically join me into the room       | Automatically joins the user into the room after the room gets created successfully.                                                                                                                                                |
 
 ### Renaming Rooms