Revise edgeR differential expression code to output results tables

I pushed my changes to the main branch in the team repository. Sorry - this means you have to rebase your branch onto main.

To test:

• Proof-read knitted .PDF and point out text that does not make sense or formatting that looks weird or bad
• Read .Rmd file and check for possible bugs or unnecessary statements and code
• Check for literal values that should instead be reported via in-line R code
• Attempt to knit the .Rmd file and make note of any errors
• Open the new output file in RStudio and visually inspect it - look for numbers that seem nonsensical

Testing:

• Proof-read knitted .PDF: Looks professional and easy to comprehend. The new section for writing results also looks good
• Read .Rmd file: Everything ran on my machine flawlessly and no issues. Everything matches up well with the knitted pdf file as well.
• Check in-line R code: I don't see any bugs for the in-line coding.
• Attempt to knit .Rmd file: I had no issues knitting the .Rmd file myself on my machine.
• Open the new output file: The CvT.txt file did save to the results folder and does open as an excel file but could look a little cleaner based off of my machine. For example, I see no column names so you don't know what the numbers are from.

Thank you [~molly] for noticing the error in the results file.
I have re-pushed a new version.

Note that I also changed the name to include "edgeR" in the file name.
The results file is now named "CvT-edgeR.txt".

After reviewing all of the commits made to the main repo and viewing the output file "CvT-edgeR.txt", it seems everything is in order now and looks great! Moving to done!