improve travis CI

Author: MikaelSlevinsky

.travis.yml

@@ -1,8 +1,10 @@
 # Documentation: http://docs.travis-ci.com/user/languages/julia/
 language: julia
 os:
+  - freebsd
   - linux
   - osx
+  - windows
 julia:
   - 1.3
   - 1.4
@@ -12,6 +14,16 @@ matrix:
     - julia: nightly
 notifications:
   email: false
-after_success:
-  - julia -e 'using Pkg; cd(Pkg.dir("FastTransforms")); Pkg.add("Documenter"); include(joinpath("docs", "make.jl"))'
-  - julia -e 'using Pkg; cd(Pkg.dir("FastTransforms")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'
+codecov: true
+jobs:
+  include:
+    - stage: "Documentation"
+      julia: 1.3
+      os: linux
+      script:
+        - julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
+        - julia --project=docs/ docs/make.jl
+      after_success: skip
+cache:
+  directories:
+    - $HOME/.julia/artifacts