Created Scene groups (markdown)

Scene-groups.md

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+As the name suggests a Scene Group is a collection of multiple scenes.  
+Scene Groups can be used as a target for scene switch actions just like a regular scene can be.  
+However each time a Scene Group is selected as a target for a scene switch action of course only one actual scene can be finally chosen.  
+The scene which is chosen to be switched to depends on the logic set up for each particular Scene Group.  
+
+Available logic types are:
+* Count:  
+This option will let you advance to the next scene based on how many times the scene group was chosen as a target to be switched to.
+* Time:  
+This option will let you advance to the next scene in the list depending on how much time has passed.
+* Random:  
+An entry of the scene list will be chosen at random, when selecting this option.
+
+Note that a scene group can contain the same scene multiple times.  
+To see an example on how scene groups can be used click [here](Advance-through-a-list-of-scenes-by-hotkey).
+  
+### Example:  
+![Example scene group](https://obsproject.com/forum/attachments/scenegroup-png.80807/)