.travis.yml go vet fix.

.travis.yml

@@ -3,18 +3,16 @@ sudo: false
 
 matrix:
   include:
-    - go: 1.2
     - go: 1.3
     - go: 1.4
     - go: 1.5
     - go: 1.6
     - go: tip
-
-install:
-  - go get golang.org/x/tools/cmd/vet
+  allow_failures:
+    - go: tip
 
 script:
   - go get -t -v ./...
   - diff -u <(echo -n) <(gofmt -d .)
-  - go vet .
+  - go vet $(go list ./... | grep -v /vendor/)
   - go test -v -race ./...