Modify ANNParametersArray to use discrete values instead of real values

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Modify GA to use the new discrete ANNParametersArray

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Change GA selector to rank selector

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Merge branch 'master' into discrete

Conflicts:
	srs2d/ga.py
Merge branch 'master' into discrete
Fix WHEELS_MAX_ANGULAR_SPEED value

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Merge branch 'master' into discrete
Fix WHEELS_MAX_ANGULAR_SPEED again

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Merge branch 'master' into discrete
Fix test (remove random=True)

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Modify fitness function (discard all energy stuff)

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Merge branch 'master' into discrete