Merge pull request #73 from lucafavatella/ci

Add recent OTP releases to be tested on Travis CI

.travis.yml

@@ -1,6 +1,9 @@
 language: erlang
 script: "GPROC_DIST=true rebar get-deps compile eunit"
 otp_release:
+    - 17.1
+    - 17.0
+    - R16B03-1
     - R16B02
     - R16B01
     - R16B