Datamodel - Added bool and enum support

Layer properties - Added bool support
Draggable float - Housekeeping 🙃

src/Artemis.Core/DefaultTypes/Properties/BoolLayerProperty.cs

@@ -0,0 +1,26 @@
+namespace Artemis.Core.DefaultTypes
+{
+    /// <inheritdoc />
+    public class BoolLayerProperty : LayerProperty<bool>
+    {
+        internal BoolLayerProperty()
+        {
+            KeyframesSupported = false;
+            DataBindingsSupported = false;
+        }
+
+        /// <summary>
+        ///     Implicitly converts an <see cref="BoolLayerProperty" /> to a <see cref="bool" />
+        /// </summary>
+        public static implicit operator bool(BoolLayerProperty p)
+        {
+            return p.CurrentValue;
+        }
+
+        /// <inheritdoc />
+        protected override void UpdateCurrentValue(float keyframeProgress, float keyframeProgressEased)
+        {
+            throw new ArtemisCoreException("Boolean properties do not support keyframes.");
+        }
+    }
+}