Fix logging config

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Fix bug in uint_exp2 (wrong casting float -> uint) and missing parentesis in step_controllers

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Update to version 0.2

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>