Install pgf dependencies on travis

jenshnielsen · jenshnielsen · commit dd2e285572f5 · 2016-01-04T13:18:10.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -13,10 +13,13 @@ addons:
       - gdb
       - mencoder
       - dvipng
+      - pgf
+      - lmodern
       - texlive-latex-base
       - texlive-latex-extra
       - texlive-fonts-recommended
       - texlive-latex-recommended
+      - texlive-xetex
       - graphviz
 #     - fonts-humor-sans
 #    sources:
