Enabled docs building.

Author: cpscotti

.travis.yml

@@ -4,11 +4,16 @@ compiler:
   - clang
   - gcc
 
+before_install:
+  - sudo apt-get -qq update
+  - sudo apt-get install -y graphviz doxygen
+
 script:
   - make unit-test/test_all
   - make examples/helloworld
   - make examples/counterwithreset
   - make examples/trivialvendingmachine
   - make examples/fancyvendingmachine
   - make examples/beatmachine
+  - make docs