Travis testing attempt 4.7

.travis.yml

@@ -8,7 +8,7 @@ python:
 before_install:
   - sudo add-apt-repository 'deb https://cloud.r-project.org/bin/linux/ubuntu xenial-cran40/'
   - sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E084DAB9
-  - sudo apt-get update
+  # - sudo apt-get update
   - sudo apt-get install -y r-base r-base-dev
   - sudo chmod ugo+rw /usr/local/lib/R/site-library 
   - R -e 'install.packages(c( "rmarkdown"), repos = "http://cran.us.r-project.org")'