test against manifest

.travis.yml

@@ -23,3 +23,7 @@ jobs:
                                                Pkg.instantiate()'
         - julia --project=docs/ docs/make.jl
       after_success: skip
+
+## uncomment the following lines to override the default test script
+script:
+ - julia --color=yes -e 'using Pkg; Pkg.activate(); Pkg.instantiate(); Pkg.test()'