#131 Some renamings

Mostly renaming those parameters related to normalization and unnormalizations, specially those exposed. The criteria is:

• normalized: refers to a state
• nornmalize: refers to an action to do over some input

Finally, the changes done are:

• Used in the forward_evaluation methods normalize_<in,out> -> <input,output>_normalized

• Used in the plotter, and internally by it flag_unnorm -> exposed ones changed to normalize_plot (so now it is the opposite, and to False by default) -> internal ones changed to to normalize

Even though I have updated most notebooks, I have not updated the ones for the pedestrian bridge example, or for Semiramis Rhino, as I don't know the state of these.