Added new 2D effects:

- 2D Floating Blobs
- 2D Ghost Rider
Crash fix for 2D Game of Life.
Added support function fill_circle() & wu_pixel().
Removed obsolete debug strings.

wled00/util.cpp

@@ -211,6 +211,9 @@ bool requestJSONBufferLock(uint8_t module)
   }
 
   jsonBufferLock = module ? module : 255;
+  DEBUG_PRINT(F("JSON buffer locked. ("));
+  DEBUG_PRINT(jsonBufferLock);
+  DEBUG_PRINTLN(")");
   fileDoc = &doc;  // used for applying presets (presets.cpp)
   doc.clear();
   return true;