anchor.diff:  
   # R packages we need for devtools - and we need devtools to be able to update the rmarkdown package
   RUN DEBIAN_FRONTEND=noninteractive wget \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/rstudioapi_0.3.1.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/rstudioapi_0.4.0.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/brew_1.0-6.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/roxygen2_5.0.1.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/rversions_1.0.2.tar.gz \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/git2r_0.11.0.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/git2r_0.13.1.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/devtools_1.9.1.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/R6_2.1.1.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/httr_1.0.0.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/RCurl_1.95-4.7.tar.gz \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/BH_1.58.0-1.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/BH_1.60.0-1.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/xml2_0.1.2.tar.gz \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/curl_0.9.3.tar.gz \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/jsonlite_0.9.17.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/curl_0.9.4.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/jsonlite_0.9.19.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/downloader_0.4.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/memoise_0.2.1.tar.gz \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.1.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/Rcpp_0.12.2.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/plyr_1.8.3.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/XML_3.98-1.3.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/whisker_0.3-2.tar.gz
   
   RUN DEBIAN_FRONTEND=noninteractive R CMD INSTALL \
  -   jsonlite_0.9.17.tar.gz \
  +   jsonlite_0.9.19.tar.gz \
      memoise_0.2.1.tar.gz \
      whisker_0.3-2.tar.gz \
      RCurl_1.95-4.7.tar.gz \
  -   Rcpp_0.12.1.tar.gz \
  +   Rcpp_0.12.2.tar.gz \
      plyr_1.8.3.tar.gz \
      R6_2.1.1.tar.gz \
  -   curl_0.9.3.tar.gz \
  +   curl_0.9.4.tar.gz \
      httr_1.0.0.tar.gz \
  -   rstudioapi_0.3.1.tar.gz \
  +   rstudioapi_0.4.0.tar.gz \
      brew_1.0-6.tar.gz \
      roxygen2_5.0.1.tar.gz \
      XML_3.98-1.3.tar.gz \
  -   BH_1.58.0-1.tar.gz \
  +   BH_1.60.0-1.tar.gz \
      xml2_0.1.2.tar.gz \
      rversions_1.0.2.tar.gz \
  -   git2r_0.11.0.tar.gz \
  +   git2r_0.13.1.tar.gz \
      devtools_1.9.1.tar.gz \
      downloader_0.4.tar.gz
   
   RUN rm \
  -   jsonlite_0.9.17.tar.gz \
  +   jsonlite_0.9.19.tar.gz \
      memoise_0.2.1.tar.gz \
      whisker_0.3-2.tar.gz \
      RCurl_1.95-4.7.tar.gz \
  -   Rcpp_0.12.1.tar.gz \
  +   Rcpp_0.12.2.tar.gz \
      plyr_1.8.3.tar.gz \
      R6_2.1.1.tar.gz \
      httr_1.0.0.tar.gz \
  -   rstudioapi_0.3.1.tar.gz \
  +   rstudioapi_0.4.0.tar.gz \
      brew_1.0-6.tar.gz \
      roxygen2_5.0.1.tar.gz \
      XML_3.98-1.3.tar.gz \
  -   BH_1.58.0-1.tar.gz \
  +   BH_1.60.0-1.tar.gz \
      xml2_0.1.2.tar.gz \
  -   curl_0.9.3.tar.gz \
  +   curl_0.9.4.tar.gz \
      rversions_1.0.2.tar.gz \
  -   git2r_0.11.0.tar.gz \
  +   git2r_0.13.1.tar.gz \
      devtools_1.9.1.tar.gz \
      downloader_0.4.tar.gz
      
   
   # libraries Eric Green wanted
   RUN DEBIAN_FRONTEND=noninteractive wget \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/lubridate_1.3.3.tar.gz \
  -   http://mirrors.nics.utk.edu/cran/src/contrib/ggplot2_1.0.1.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/lubridate_1.5.0.tar.gz \
  +   http://mirrors.nics.utk.edu/cran/src/contrib/ggplot2_2.0.0.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/RColorBrewer_1.1-2.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/dichromat_2.0-0.tar.gz \
      http://mirrors.nics.utk.edu/cran/src/contrib/colorspace_1.2-6.tar.gz \
  
positive.code:    formatR_1.2.1.tar.gz \
     evaluate_0.8.tar.gz \
     markdown_0.7.7.tar.gz \
     knitr_1.11.tar.gz 
  
  RUN rm \
     evaluate_0.8.tar.gz \
  
negative.code:    readr_0.2.2.tar.gz \
     selectr_0.2-3.tar.gz \
     rvest_0.3.1.tar.gz \
     pbkrtest_0.4-4.tar.gz 
  
  RUN rm \
     chron_2.3-47.tar.gz \
  