Make Vector an immutable class. Contributes to CURA-1504
Make Vector an immutable class.
Contributes to CURA-1504

senttech/Cura,Curahelper/Cura,Curahelper/Cura,fieldOfView/Cura,fieldOfView/Cura,hmflash/Cura,totalretribution/Cura,totalretribution/Cura,senttech/Cura,hmflash/Cura,ynotstartups/Wanhao,ynotstartups/Wanhao