Add inotify dep.

Author: oubiwann

.travis.yml

@@ -1,4 +1,5 @@
 language: erlang
+sudo: false
 install: true
 before_script:
     - wget https://s3.amazonaws.com/rebar3/rebar3
@@ -12,4 +13,7 @@ otp_release:
   - 18.3
   - 17.5
   - R16B03-1
-
+addons:
+  apt:
+    packages:
+      - inotify