Add SDK versioning support

Author: abeaumont

.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/java-driver/driver/normalizer"
 )

driver/normalizer/annotation.go

@@ -3,8 +3,8 @@ package normalizer
 import (
 	"github.com/bblfsh/java-driver/driver/normalizer/jdt"
 
-	. "github.com/bblfsh/sdk/uast"
-	. "github.com/bblfsh/sdk/uast/ann"
+	. "gopkg.in/bblfsh/sdk.v0/uast"
+	. "gopkg.in/bblfsh/sdk.v0/uast/ann"
 )
 
 var AnnotationRules = On(jdt.CompilationUnit).Roles(File).Descendants(

driver/normalizer/annotation_test.go

@@ -8,7 +8,7 @@ import (
 	"path/filepath"
 	"testing"
 
-	"github.com/bblfsh/sdk/uast"
+	"gopkg.in/bblfsh/sdk.v0/uast"
 	"github.com/stretchr/testify/require"
 )
 

driver/normalizer/jdt/jdt.go

@@ -4,7 +4,7 @@ package jdt
 // GENERATED BY java-driver GoGen
 // DO NOT EDIT
 
-import "github.com/bblfsh/sdk/uast/ann"
+import "gopkg.in/bblfsh/sdk.v0/uast/ann"
 
 // Eclipse JDT node types.
 // This includes all non-abstract classes extending from ASTNode.

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{

native/src/test/java/bblfsh/GoGen.java

@@ -47,7 +47,7 @@ public void generate() {
                 + "// GENERATED BY java-driver GoGen\n"
                 + "// DO NOT EDIT\n"
                 + "\n"
-                + "import \"github.com/bblfsh/sdk/uast/ann\"\n\n"
+                + "import \"gopkg.in/bblfsh/sdk.v0/uast/ann\"\n\n"
         );
         out.print(""
                 + "// Eclipse JDT node types.\n"