Add golint and ineffassign to CI scripts

golint is not part of the tests since our Markdown dependency defines
an interface that is not lint-compliant (unfortunately).
See https://github.com/russross/blackfriday/issues/240

.travis.yml

@@ -18,8 +18,14 @@ install:
   - if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then bash dist/gitcookie.sh; fi
   - go get -t ./...
   - go get golang.org/x/tools/cmd/vet
+  - go get github.com/golang/lint/golint
+  - go get github.com/gordonklaus/ineffassign
 
 script:
   - "[ -z \"$(find -name \"*.go\" | xargs gofmt -s -l)\" ] || exit 1"
+  - ineffassign .
   - go vet ./...
   - go test ./...
+
+after_script:
+  - golint ./...

appveyor.yml

@@ -14,13 +14,20 @@ install:
   - 7z x go1.6.windows-amd64.zip -y -oC:\ > NUL
   - go version
   - go env
-  - go get golang.org/x/tools/cmd/vet
   - go get -t ./...
+  - go get golang.org/x/tools/cmd/vet
+  - go get github.com/golang/lint/golint
+  - go get github.com/gordonklaus/ineffassign
+  - set PATH=%GOPATH%\bin;%PATH%
 
 build: off
 
 test_script:
   - go vet ./...
   - go test ./...
+  - ineffassign .
+
+after_test:
+  - golint ./...
 
 deploy: off