Bug in L1 for PHI fixed, Added parfor option, Option to compute PHI with KLD

- Parfor option was added. If a single system is run, it should be on
for speed. If multiple systems are run at the same time (e.g. animats)
parfor should be off for speed (ONLY AFFECTS PARFOR IN big_phi_all.m)
- PHI can now also be calculated with KLD difference between concepts
(although we don't really need that option)