Gltf model and animations exploring problems (#1635)

* Added bone binding to whole mesh and not only set vertices.
+ Also added missed setting of the animation count.
+ Removed double ; on one line

* Added more of the gltf sample models

https://github.com/KhronosGroup/glTF-Sample-Models
We need to make it working for all of them.

* Binding to initial bind pose added.

* Fix cube disappearing bug because lerpPercent could be Inf.

* Fixed for rigged figure also

examples/models/resources/gltf/AnimatedTriangle.gltf

@@ -0,0 +1,118 @@
+{
+  "scene" : 0,
+  "scenes" : [
+    {
+      "nodes" : [ 0 ]
+    }
+  ],
+  
+  "nodes" : [
+    {
+      "mesh" : 0,
+      "rotation" : [ 0.0, 0.0, 0.0, 1.0 ]
+    }
+  ],
+  
+  "meshes" : [
+    {
+      "primitives" : [ {
+        "attributes" : {
+          "POSITION" : 1
+        },
+        "indices" : 0
+      } ]
+    }
+  ],
+  
+  "animations": [
+    {
+      "samplers" : [
+        {
+          "input" : 2,
+          "interpolation" : "LINEAR",
+          "output" : 3
+        }
+      ],
+      "channels" : [ {
+        "sampler" : 0,
+        "target" : {
+          "node" : 0,
+          "path" : "rotation"
+        }
+      } ]
+    }
+  ],
+
+  "buffers" : [
+    {
+      "uri" : "data:application/octet-stream;base64,AAABAAIAAAAAAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAAAAAAAAACAPwAAAAA=",
+      "byteLength" : 44
+    },
+    {
+      "uri" : "data:application/octet-stream;base64,AAAAAAAAgD4AAAA/AABAPwAAgD8AAAAAAAAAAAAAAAAAAIA/AAAAAAAAAAD0/TQ/9P00PwAAAAAAAAAAAACAPwAAAAAAAAAAAAAAAPT9ND/0/TS/AAAAAAAAAAAAAAAAAACAPw==",
+      "byteLength" : 100
+    }
+  ],
+  "bufferViews" : [
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+      "byteOffset" : 0,
+      "byteLength" : 6,
+      "target" : 34963
+    },
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+      "byteLength" : 36,
+      "target" : 34962
+    },
+    {
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+      "byteLength" : 100
+    }
+  ],
+  "accessors" : [
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+      "count" : 3,
+      "type" : "SCALAR",
+      "max" : [ 2 ],
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+    },
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+      "type" : "SCALAR",
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+      "componentType" : 5126,
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+      "min" : [ 0.0, 0.0, 0.0, -0.707 ]
+    }
+  ],
+  
+  "asset" : {
+    "version" : "2.0"
+  }
+  
+}