add flatten, enable documenter docs, update travis

Author: Jutho

.travis.yml

@@ -14,9 +14,9 @@ git:
 
 ## uncomment the following lines to allow failures on nightly julia
 ## (tests will run but not make your overall status red)
-#matrix:
-#  allow_failures:
-#  - julia: nightly
+matrix:
+ allow_failures:
+ - julia: nightly
 
 ## uncomment and modify the following lines to manually install system packages
 #addons:
@@ -30,7 +30,16 @@ git:
 #script:
 #  - julia -e 'Pkg.clone(pwd()); Pkg.build("TupleTools"); Pkg.test("TupleTools"; coverage=true)'
 after_success:
-  # push coverage results to Coveralls
-  - julia -e 'cd(Pkg.dir("TupleTools")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
-  # push coverage results to Codecov
-  - julia -e 'cd(Pkg.dir("TupleTools")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'
+  # push coverage results to Codecov and Coveralls
+  - julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder()); Coveralls.submit(Coveralls.process_folder())'
+
+jobs:
+  include:
+    - stage: "Documentation"
+      julia: 1.0
+      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