added authors to html output

Author: trevorcampbell

_bookdown.yml

@@ -3,4 +3,4 @@ language:
   ui:
     chapter_name: "Chapter "
 delete_merged_file: true
-rmd_files: ["index.Rmd", "intro.Rmd", "reading.Rmd", "wrangling.Rmd", "viz.Rmd", "classification1.Rmd", "classification2.Rmd", "regression1.Rmd", "regression2.Rmd", "clustering.Rmd", "inference.Rmd", "jupyter.Rmd", "version-control.Rmd", "setup.Rmd", "appendixA.Rmd", "references.Rmd"]
+rmd_files: ["index.Rmd", "authors.Rmd", "intro.Rmd", "reading.Rmd", "wrangling.Rmd", "viz.Rmd", "classification1.Rmd", "classification2.Rmd", "regression1.Rmd", "regression2.Rmd", "clustering.Rmd", "inference.Rmd", "jupyter.Rmd", "version-control.Rmd", "setup.Rmd", "appendixA.Rmd", "references.Rmd"]