cleanup: rename package and vendor dependencies for old go versions

Fixes #8 and begins to address deployability.

parser/block.go

@@ -3,8 +3,8 @@ package parser
 import (
 	"fmt"
 
-	"github.com/gtank/ctxd/parser/internal/bytestring"
-	"github.com/gtank/ctxd/rpc"
+	"github.com/zcash-hackworks/lightwalletd/parser/internal/bytestring"
+	"github.com/zcash-hackworks/lightwalletd/rpc"
 	"github.com/pkg/errors"
 )
 

parser/block_header.go

@@ -7,7 +7,7 @@ import (
 	"log"
 	"math/big"
 
-	"github.com/gtank/ctxd/parser/internal/bytestring"
+	"github.com/zcash-hackworks/lightwalletd/parser/internal/bytestring"
 	"github.com/pkg/errors"
 )
 

parser/transaction.go

@@ -3,8 +3,8 @@ package parser
 import (
 	"crypto/sha256"
 
-	"github.com/gtank/ctxd/parser/internal/bytestring"
-	"github.com/gtank/ctxd/rpc"
+	"github.com/zcash-hackworks/lightwalletd/parser/internal/bytestring"
+	"github.com/zcash-hackworks/lightwalletd/rpc"
 	"github.com/pkg/errors"
 )
 

parser/transaction_test.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/gtank/ctxd/parser/internal/bytestring"
+	"github.com/zcash-hackworks/lightwalletd/parser/internal/bytestring"
 )
 
 // "Human-readable" version of joinSplit struct defined in transaction.go.