Merge pull request #23 from wibeasley/patch-1

linux in travis

.travis.yml

@@ -10,6 +10,51 @@ fortran: true
 
 matrix:
   include:
+    - os: linux
+      dist: trusty
+      sudo: required
+
+      r_binary_packages:
+        - stringi
+        - magrittr
+        - curl
+        - jsonlite
+        - Rcpp
+        - bindrcpp
+        - RcppEigen
+        - rpf
+        - openssl
+        - rlang
+        - igraph
+        - utf8
+        - gss
+        - haven
+        - XML
+        - data.table
+        - matrixStats
+        - rgl
+        - dplyr
+        - purrr
+        - tidyr
+        - readr
+        - minqa
+        - mvtnorm
+        - nloptr
+        - SparseM
+        - lme4
+        - httpuv
+        - markdown
+        - OpenMx
+        - sem  
+        - readxl
+        - openxlsx
+        - pander
+        - minpack.lm
+        - StanHeaders
+
+        # "These installs will be faster than source installs, but may not always be the most recent version"
+        # https://docs.travis-ci.com/user/languages/r/#Additional-Dependency-Fields
+
 #   precise is getting decommissioned on Travis, so better to leave it out
 #    - os: linux
 #      dist: trusty
@@ -29,6 +74,7 @@ addons:
     packages:
     - libcurl4-openssl-dev
     - libxml2-dev
+    - libgsl0-dev
 
 repos:
   CRAN: https://cloud.r-project.org