STYLE BUG FIX increase in the size of the loss graph and metrics when the number of epochs is low
In the context of DL learning:
The x_size of the loss and metric graphs, with a value of 0.2*n_epoch is less than 1 for a training of less than 5 epochs. A value of x_size less than 1 leads to this error SystemError: tile cannot extend outside image
from the PIL library. More over in case of low number of epoch the graphs are scrashed, like one the joined picture.
Therefore I fixed a x_size minimal (10) for the graphs.