- Mesh upload support

- LLMesh asset decoding and encoding (inc. LLPhysicsConvex, LLSkin, LLSubMesh)
- Query inventory folder by type
- onSelectedObject event
- fetchInventoryItem command
- Fix packing/unpacking of object shape
- Time sync with SimulatorViewerTimeMessage
- Changed several classes to a .from style rather than setting up in the constructor (exception friendly)
- Whole bunch of other improvements
- Object building

lib/classes/public/interfaces/LLSkin.ts

@@ -0,0 +1,10 @@
+import {mat4} from '../../../tsm/mat4';
+
+export interface LLSkin
+{
+    jointNames: string[];
+    bindShapeMatrix: mat4;
+    inverseBindMatrix: mat4[];
+    altInverseBindMatrix?: mat4[];
+    pelvisOffset?: mat4;
+}