Simplify3D Tool Change Script

Simplify3D Tool Change Script
=======================
This script is inspired from the Script thread over at the Simplify3D forum, specifically the [post](https://forum.simplify3d.com/viewtopic.php?f=8&t=1959&sid=7e9f12065fe739a1e251012471dd6d2a#p11072) by user [blaknite7](https://forum.simplify3d.com/memberlist.php?mode=viewprofile&u=29611).

My version of Simplify3D doesn't parse the place holder variables for tool temperatures in the tool change script, so I used my absolute printing temperatures there instead.

The clear benefit of this approach is near full elimination of oozing and drips on the print. The drawback is that print time on multicolour layers are near doubled in printing time. Be warned :)

There are two versions here of the script, I've used the M133 script on my Sailfish firmware Wanhao Duplicator 4S printer. This is because my printer doesn't honor the M109 command. So I use two M104 commands followed by a M133 command.

The second version uses a M109 co