typo in boolean "slideShopPlaying" instead of "slideShowPlaying"

[BertLindeman]

While waiting for my Earth Listener to be delivered I looked at the firmware.
Not really important but just noticed this, so why not report it.
If you want me to, I can create a pull request.

 Found in .\EarthListener3v4_final.ino.............................................. Found      2
--> 162 boolean slideShopPlaying;        //is the slideshow playing? yes=1, no=0
--> 340           if(slideShopPlaying)
 Found in C:\Users\bert.grijshuid\Downloads\Velleman\VM211_Firmware\functions.ino... Found      7
--> 1004       if(slideShopPlaying)
--> 1028       if(slideShopPlaying)
--> 1299     slideShopPlaying = 0;
--> 1308     slideShopPlaying = 0;
--> 1317     slideShopPlaying = 0;
--> 1326     slideShopPlaying = 0;
--> 1338   if(slideShopPlaying) { slideShopPlaying = 0; } else { slideShopPlaying = 1; }
 Found in C:\Users\bert.grijshuid\Downloads\Velleman\VM211_Firmware\setup.ino....... Found      1
--> 263   slideShopPlaying = 0;   //we always start without slideshow```

[BertLindeman]

Issue solved at version 4.0