Add another parameter to Settings: n_bootstrap. It allows an Agent to
force the number of bootstrapping steps independently of the its
sensorimotor model
Add the possibility to choose if we log the (m, s) pair in
Environment.update. Allow to avoid logging environment updates due to
evaluation. Add Evaluation.plot_testcases(.)
Change the simple_arm high_dimensional configuration in order to improve
learning curve differences between motor and goal babbling
Add the possibility of automatically set the axis limit of scatter plots
to the sensorimotor bounds. Necessitate to pass expl_dims and inf_dims
to ExperimentLog in order to retrieve 'choice' and 'inference' space
boundaries
Change the default nearest_neighbor sm_model configuration. Do not allow
a parametrized number of step anymore (only 1, otherwise it would
actually kills the framework consistency ...)
Add ILO-GMM as a new (and registered) sensorimotor_model
Merge branch 'master' of github.com:flowersteam/explauto  Replace the
sm_model config for the poppy experiment to default (should work well)

Conflicts:
	explauto/sensorimotor_model/nearest_neighbor.py