Removed old agents
New evolutionary search agent -- EASearch

GASearch re-implemented using a simple EA library. Should have the same
functionality, but has more configurable and extendable operators and
selectors.

Still ignores some of the parameters (xover and mutation rates), and
some of its parameters (operators, selectors) cannot be set.
EASearch options added to opt file
EASearch now has a simple cache of previously evaluated options, these are not evaluated again
Improved EASearch

Improved mutation operator (now Gaussian mutation on float and int
options, random mutation on set options).
The maximum number of option evaluations can be set.
Debugged the creation of instances from the archive

Also, added a class for surrogate mutation operator. Does nothing so far
(trains the model, but otherwise only copies parents to offspring).
Added surrogate modelling and surrogate based mutation

Also, fixed a bug in coverting the individual to weka instances for
BoolSItem schema.
Fixed bug in SearchItemIndividualMutation

changeWidth was ignored
Changed the opt file for SMO

Also, changed some constants in EASearch, these should probably be
changed to parameters.
Agent_Search set error and kappa_statistic as two objectives
Merge commit '1b9d6ddd4e8b' into merge2

Conflicts:
	init
	src/pikater/Agent_AgentManager.java
	src/pikater/Agent_DataManager.java
	src/pikater/Agent_Search.java
Removed Java GUI. Changed second objective to RMSE.
Added support for simple (naive) multiobjective optimization.

SearchItemIndividual now stores vector of objective values.
TwoObjectiveTournament added -> selects the individuals based on the
objectives in the lexicographical ordering.
Added proper multiobjective optimization (NSGA-II)

WARNING: Work in progress, not tested.
Fixed error in Agent_ComputingAgent. Debugged multiobjective optimization.

Also changed the TournamentSelector to minimize the fitness, and changed
the fitness accordingly.
Tweaks in Agent_EASearch.
commit before merge
after merge
abstract Recommender and BasicRecommender agents created
abstract Recommender and BasicRecommender agents created