add golint and go test

.travis.yml

 language: go
 
 go:
-  - 1.5.1
-
+  - 1.5.3
+  - 1.4.3
+  - 1.3.3
 services:
   - redis-server
   - mysql
@@ -24,7 +25,14 @@ install:
   - go get github.com/couchbase/go-couchbase
   - go get github.com/siddontang/ledisdb/config
   - go get github.com/siddontang/ledisdb/ledis
+  - go get code.google.com/p/go.tools/cmd/vet
+  - go get code.google.com/p/go.tools/cmd/cover
+  - go get github.com/golang/lint/golint
 before_script:
   - sh -c "if [ '$ORM_DRIVER' = 'postgres' ]; then psql -c 'create database orm_test;' -U postgres; fi"
   - sh -c "if [ '$ORM_DRIVER' = 'mysql' ]; then mysql -u root -e 'create database orm_test;'; fi"
   - sh -c "if [ '$ORM_DRIVER' = 'sqlite' ]; then touch $TRAVIS_BUILD_DIR/orm_test.db; fi"
+script:
+  - go vet -x ./...
+  - $HOME/gopath/bin/golint ./...
+  - go test -v ./...