Travis testing attempt 4.3

.travis.yml

@@ -6,9 +6,9 @@ python:
   - "3.7"
 
 before_install:
-  - sudo apt-get install -y r-base
-  # - sudo apt-get install r-base-dev
-  - sudo apt-get install gfortran
+  # - sudo apt-get install -y r-base
+  - sudo apt-get install -y r-base-dev
+  # - sudo apt-get install gfortran
   - sudo chmod ugo+rw /usr/local/lib/R/site-library 
   - R -e 'install.packages(c( "rmarkdown"), repos = "http://cran.us.r-project.org")'