Added evmod_assets and started using it for scripts

Signed-off-by: Robear Selwans <robear.selwans@outlook.com>

res/scripts/Scene0/child.lua

@@ -0,0 +1,15 @@
+this.on_init = function ()
+  this.custom_eulerangles = Vec3:new()
+  this.custom_angularvelocity = Vec3:new(0, 0.01, 0)
+end
+
+this.on_fixedupdate = function ()
+  print('Scene0 OnFixedUpdate Entity #' .. this.entityID)
+  if Input.getKeyDown(Input.KeyCode.Left) then
+    this.custom_eulerangles:add(Vec3:new(0,0.01,0))
+  end
+  if Input.getKeyDown(Input.KeyCode.Right) then
+    this.custom_eulerangles:sub(Vec3:new(0,0.01,0))
+  end
+  this.eulerAngles = this.custom_eulerangles
+end