blog/replicating-fama-french-5-factor-model

[christophscheuch]

In order to replicate the 5 FF factors, I had to do the following:

• Extend Compustat query & variable construction
• Change Fama-French data download
• Adapt the whole replicating-fama-and-french-factors chapter

I currently only did the last part in R because I want to get approval first.

The following parts still need to be done:

• Adapt python/replicating-fama-and-french-factors
• Update r/changelog

[christophscheuch]

From my side the PR is ready to merge, waiting for approval from @patrick-weiss. I'll update changelog after merge and reference the PR.