create new function autosize_y_axis

[queirozfcom]

I always need to do this, in every plot

plt.ylim(0,100)
plt.yticks(np.arange(0,101,10))

where:

• 100 is the top value in the y axis
• 101 is the top value plus 1 (or the top value doesn't show up in the axis)
• 10 is the space between ticks in the axis
  • this should be calculated so that there are 10 ticks. 10 is a sensible default, but allow users to adjust that obviously)
  • the ticks must be whole numbers like 1,000 and 10,000 and go up in whole numbers too.