fix fsnotify relocation

* http://gopkg.in/fsnotify/fsnotify.v1 is the new location
* see: https://github.com/go-fsnotify/fsnotify

Author: Lucas Kacher

.travis.yml

@@ -15,5 +15,5 @@ matrix:
     - go: tip
 
 install:
-  - go get gopkg.in/fsnotify.v1
+  - go get gopkg.in/fsnotify/fsnotify.v1
   - go get gopkg.in/tomb.v1