Optimized some slow parts of the engine.

Last low hanging fruit: parsing is slow, cache parsed calculations

app/imports/api/engine/computeCreature.js

@@ -3,11 +3,9 @@ import computeCreatureComputation from './computation/computeCreatureComputation
 import writeAlteredProperties from './computation/writeComputation/writeAlteredProperties.js';
 
 export default function computeCreature(creatureId){
-  console.time('Compute creature');
   const computation = buildCreatureComputation(creatureId);
   computeCreatureComputation(computation);
   writeAlteredProperties(computation);
-  console.timeEnd('Compute creature');
 }
 
 // For now just recompute the whole creature, TODO only recompute a single