travis: add gometalinter tests

.travis.yml

@@ -6,8 +6,11 @@ go:
 
 before_install:
   - go get -u -t ./...
+  - go get -u gopkg.in/alecthomas/gometalinter.v1
+  - gometalinter.v1 --install
 
 script:
+  - gometalinter.v1 --config metalinter.json ./...
   - ./test.sh
 
 after_success:

metalinter.json

@@ -0,0 +1,21 @@
+{
+    "Vendor": true,
+    "DisableAll": true,
+    "Enable": [
+        "gofmt",
+        "goimports",
+        "interfacer",
+        "goconst",
+        "misspell",
+        "unconvert",
+        "gosimple",
+        "golint",
+        "structcheck",
+        "deadcode",
+        "vet"
+    ],
+    "Exclude": [
+        "initTests is unused"
+    ],
+    "Deadline": "2m"
+}