use travis build stages for doc build

.travis.yml

@@ -12,12 +12,17 @@ matrix:
 branches:
   only:
     - master
+jobs:
+  include:
+    - stage: deploy
+      julia: 0.6
+      os: linux
+      script:
+        - julia -e 'Pkg.clone(pwd()); Pkg.build("Literate"); Pkg.add("Documenter"); cd(Pkg.dir("Literate")); include("docs/make.jl")'
 notifications:
   email: false
 git:
   depth: 99999999
 after_success:
-  # build docs
-  - julia -e 'Pkg.add("Documenter"); Pkg.checkout("Documenter"); cd(Pkg.dir("Literate")); include("docs/make.jl")'
   # push coverage results to Codecov
   - julia -e 'cd(Pkg.dir("Literate")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'

docs/make.jl

@@ -32,6 +32,7 @@ makedocs(
 deploydocs(
     repo = "github.com/fredrikekre/Literate.jl.git",
     target = "build",
+    osname = "linux",
     julia = "0.6",
     deps = nothing,
     make = nothing