Merge branch 'add-shebang-to-r-scripts' into 'master'

Add shebang to r scripts, create .gitignore

See merge request !4

.gitignore

+*.csv
+*.RDS
\ No newline at end of file

r/ExtractFromXML.R

+#!/usr/bin/env Rscript
+
 library(xml2)
 
 data <- read_xml("../data/Wikipedia-20181120103842.xml")

r/PhysicistsList.R

+#!/usr/bin/env Rscript
+
 ### Extract list of pyhsicists from wikipedia article
 
 library(rvest)