[bitcrowd#16] Set up continuous integration checks

.gitignore

@@ -7,7 +7,8 @@
 # The directory Mix downloads your dependencies sources to.
 /deps
 
-# Where 3rd-party dependencies like ExDoc output generated docs.
+# Where 3rd-party dependencies like ExDoc and InchEx output generated docs.
+/docs
 /doc
 
 # If the VM crashes, it generates a dump, let's ignore it too.

.travis.yml

@@ -0,0 +1,10 @@
+language: elixir
+elixir:
+  - 1.3
+  - 1.4
+script:
+  # TODO: Fix existing issues and enable credo code checks
+  # - mix credo --strict
+  - mix test
+after_script:
+  - mix inch.report

mix.exs

@@ -24,8 +24,8 @@ defmodule SSHKit.Mixfile do
 
   defp deps do
     [{:credo, "~> 0.7", only: [:dev, :test]},
-     {:ex_doc, "~> 0.14", only: [:dev]},
-     {:inch_ex, ">= 0.0.0", only: [:dev]}]
+     {:ex_doc, "~> 0.14", only: [:dev], runtime: false},
+     {:inch_ex, "~> 0.5", only: [:dev, :test]}]
   end
 
   defp description do