Add a page on Standardising/Rescaling data

[saranggupta94]

Hi Zach, @zachbogart , do you think adding a section on standardising and rescaling the data would be helpful? I can show different ways to standardise/rescale data, compare between the approaches and highlight the advantages. Can this count as my community contribution?

[zachbogart]

All sounds good. Will be interested in seeing your approach. Yes, it counts for community contribution.