* Ensures cores, slimes cannot be used twice in their machines.
* Fixes xenos appearing friendly, simple_mob death problems.
Simple mobs that were dead and not of the hostile subtype wouldn't call walk(src,0), which prevents corpses from following their target.
* Cleans up trait data when a xeno or xeno product is removed.
* Slimes more likely to have amutationtoxin, consumes virusfood.
* Fixes some issues.
* Adds changelog
Adds nameVar to products, sets it to products/xenos when they are created from the proper machinery.
Adds the manual injector to the machinery that can take beakers, preventing them from spilling onto the machine when inserted.
Tweaks the NanoUI to properly display percent mutated, adds a proper check to see if it is not a xeno occupant.
