Run Markdown Script with make

Created a Makefile to be used to run R markdown scripts. See README for more info. Also created R and html subdirectories. The repo should contain the html subdirectory but not the files in it.

Makefile

@@ -0,0 +1,15 @@
+route_analysis: R/route_analysis.Rmd
+	R -e 'library("rmarkdown"); old_path <- Sys.getenv("PATH"); Sys.setenv(PATH = paste(old_path, "/usr/local/bin", sep = ":")); rmarkdown::render(knit_root_dir = "~/route_analysis/", output_dir = "~/route_analysis/html", input = "./R/route_analysis.Rmd", output_file = "./html/route_analysis.html")'
+
+clean: clean-data clean-figure clean-script
+
+clean-data:
+	rm -vf ./R/data/*.rds
+
+clean-script:
+	rm -rvf ./*.md
+
+clean-figure:
+	rm -rvf ./figure/
+
+.PHONY: data