Gravitrax insert for basic tile

Here is a lot of insert for the basic tiles.
Some, we need an improved tile available here https://www.thingiverse.com/thing:3552100

Edit 09/11/2019: adding "_milieu u chute"

Edit 25/04/2020 : make a nex suite in this post https://www.thingiverse.com/thing:4311915

Edit 22/05/2020 : make a new version of "_milieu chute" which rails connetor and post a hammer, a switch and a gauss in different post