Merge all the fusion procedures, except AddFusionProcFunFunRep and...

Merge all the fusion procedures, except AddFusionProcFunFunRep and AddFusionProcCodeFunRep under AddFusionProcMix (#858)

* Merge all the AddFusionProcCodeN into one

I took the procedure made by vanilla salt and merged the various fusion procedure into one that can use an arbitrary number of materials, still keeping a retro compatibility with the older ones

* Readded cmments

* Updated AddFusionProcCodeRep

* fix

* Update utility.lua

* fix

* Added AddFusionProcFun(), updated AddFusionProcFun2 and AddFusionProcFunRep

* Update utility.lua

* Update utility.lua

* fix

* Merge all under AddFusionProcMix, except AddFusionProcFunFunRep and AddFusionProcCodeFunRep

* Added effect copying check

* fixed fusion substitute