Assorted blob changes

Adds "Split consciousness" a 100 cost, node requiring (think blobbernaut) power that produces a second blob overmind (with it's own unique reagent!)
Alters code to require only 1 var instead of 4, alters some cases where blobs of a different colour change.
Fixes the core and shield blobs of the overmind sometimes being a different colour to the rest.
Makes blob spores the same colour as their overmind, but retain the husk icon in zombie mode (These are slightly off colour due to still being orange by default)

(Extra commits should disappear once this is merged into the branch)