adding travis config

Author: slogsdon

.gitignore

@@ -2,3 +2,4 @@
 /deps
 erl_crash.dump
 *.ez
+docs/

.travis.yml

@@ -0,0 +1,19 @@
+language: erlang
+otp_release:
+  - 17.0
+  - 17.1
+  - 17.2
+  - 17.3
+env:
+  - ELIXIR="1.0.0"
+before_install:
+  - wget http://s3.hex.pm/builds/elixir/v$ELIXIR.zip
+  - unzip -d elixir v$ELIXIR.zip
+before_script:
+  - export PATH=`pwd`/elixir/bin:$PATH
+  - mix local.hex --force
+  - "MIX_ENV=test mix do deps.get, compile"
+script:
+  - mix test
+after_success:
+  - MIX_ENV=test mix coveralls.travis