Add English for maps update

docs/maps.en.md

@@ -11,6 +11,7 @@ This tutorial is "work in progess", hence its worth checking it from time to tim
 
 * 2020-12-08: Animations added.
 * 2020-12-11: Assembly registration added, Lobbymaps added, hightlighting current layer.
+* 2020-12-15: Sound, BBB, Map size added.
 
 ## Known Bugs
 Following bugs are known and worked on:
@@ -19,7 +20,11 @@ Following bugs are known and worked on:
   exitSceneUrl works instead, but ist deprecated.
 
 ## Limitations
-Instcances wont scale without no limit, please keep that in mind while building maps. From our experience the limit is somewhere around 200 players. Maps for 2k players wont make any sense. Please dont try to build lecture halls. There's no sense in idling in the game while watching talks.
+Instcances wont scale indefinetly, please keep that in mind while building maps. From our experience the limit is somewhere around 200 players. Maps for 2k players wont make any sense. Please dont try to build lecture halls. There's no sense in idling in the game while watching talks.
+
+Regardless of this you can choose the map size relativly fleixble.
+Maps in the ballpark of 128x128 tils run quite smooth, maps with 1000x1000 tiles will come with a significant loading time.
+We hence recomend using a number of smaller maps rather than a single big one.
 
 External links will be sent through a dereferrer.
 
@@ -90,10 +95,12 @@ You can embed websites that will open when stepping on certain tiles. To do this
 ![](img/cp_openwebsite.png)
 
 ##### Embedding jitsi
-Jitsi rooms may be embedded into maps in the same way. Simple set the custom property "jitsiRoom" (string) and input the room name as the value. There will only be jitsi rooms on the servers hosted by us, no external servers.
+Jitsi rooms may be embedded into maps in the same way. Simple set the custom property "jitsiRoom" (string) and input the room name as the value.
 
 ![](img/cp_jitsiroom.png)
 
+By default jitsi rooms will be bound to the instance, this is to ensure that everyone has their own "hackcenter". Please prefix your room with "shared", should you want to share a jitsi room across instaces. (e.g. "shared our jitsiroom"). No external jitsi rooms will be allowed only the ones provided by us. 
+
 ##### Silent areas
 Should you not want audio and video communication between participants in certain areas, you can set the custom property "silent" bool true in a layer defining the area.
 
@@ -123,6 +130,16 @@ To show animations in tiled, set the corresponding option:
 
 Tip: The engine does tile-updates every 100ms, animations with a shorter frame duration will most likely not look that good or may even do not work.
 
+Bigger animations need to animated in tiled tile by tile. This however is relativly straight forward.
+(Occationally some tiles dont run in sync with the rest, cthulu knows why...)
+
+### Sound
+Layers with the property "playAudio" (String) will play a sound associated with the tile. Both mp3 files, as well as mp3 streams are supported. If you want to loop the audio please use the property "playAudioLoop" (string).
+
+![](img/settings_sound.png)
+
+Please only use **GEMA-free** Music, as you will have to register your assembly with GEMA otherwise! If you embed streams you will also be required to keep a tracklist to be able to proove to GEMA that you only played "gema-free music"
+
 ### Saving and exporting maps
 Maps need to be saved as json files, tilesets should be embedded prior to this. The relevant files the will be you map in json format and will use the tilesets in png format. Infinite maps need to be converted to finite dimension maps before exporting. To do so just untick the "infinite" tick box and safe.