Time measuring utils from LWAPTK
Experimental Framework: Driver script

* First pass on a simple yet functional script that allows to compare
  us Random, Breadth-First Search and Novelty Search agents, following
  Bellemare et al. experimental framework
Experimental settings

* # of episodes settings set to 1 (simplifies processing the output)
* Changed comment next to # sim steps per node setting
Episode information logging

* Now a file is created for each episode, that (for now) contains the
  total elapsed time during the episode as well as the final score
  attained by the agent.
Changes preparing for experiments

* Added method to SearchTree and FullSearchTree to print relevant search information
  for each frame an action is evaluated
* Reorganized attributes storing members such as # generated, expanded, pruned nodes etc.