Versioned sdk imports

.travis.yml

@@ -7,7 +7,7 @@ services:
   - docker
 
 before_script:
-  - go get -v github.com/bblfsh/sdk/...
+  - go get -v gopkg.in/bblfsh/sdk.v0/...
   - bblfsh-sdk prepare-build .
   - go get -v -t ./...
 

driver/main.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	"github.com/bblfsh/sdk/protocol/driver"
+	"gopkg.in/bblfsh/sdk.v0/protocol/driver"
 
 	"github.com/bblfsh/python-driver/driver/normalizer"
 )

driver/normalizer/annotation.go

@@ -5,8 +5,8 @@ import (
 
 	"github.com/bblfsh/python-driver/driver/normalizer/pyast"
 
-	. "github.com/bblfsh/sdk/uast"
-	. "github.com/bblfsh/sdk/uast/ann"
+	. "gopkg.in/bblfsh/sdk.v0/uast"
+	. "gopkg.in/bblfsh/sdk.v0/uast/ann"
 )
 
 /*

driver/normalizer/annotation_test.go

@@ -6,8 +6,8 @@ import (
 	"path/filepath"
 	"testing"
 
-	"github.com/bblfsh/sdk/uast"
 	"github.com/stretchr/testify/require"
+	"gopkg.in/bblfsh/sdk.v0/uast"
 )
 
 var (

driver/normalizer/parser.go

@@ -1,8 +1,8 @@
 package normalizer
 
 import (
-	"github.com/bblfsh/sdk/protocol/driver"
-	"github.com/bblfsh/sdk/protocol/native"
+	"gopkg.in/bblfsh/sdk.v0/protocol/driver"
+	"gopkg.in/bblfsh/sdk.v0/protocol/native"
 )
 
 var ToNoder = &native.ObjectToNoder{