fixed token example and fixed compiler test with multiple dirs (CityOfZion/neo-storm#20)

Imported from CityOfZion/neo-storm (2d0814a04c34f320dee41674066ccd766a7a8ea1).

examples/token/token.go

@@ -1,7 +1,7 @@
 package token_contract
 
 import (
-	"nep5"
+	"github.com/CityOfZion/neo-storm/examples/token/nep5"
 
 	"github.com/CityOfZion/neo-storm/interop/storage"
 	"github.com/CityOfZion/neo-storm/interop/util"

pkg/vm/compiler/compiler_test.go

@@ -22,13 +22,11 @@ func TestExamplesFolder(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
-		if len(infos) > 1 {
-			t.Fatal("detected smart contract folder with more than 1 contract file")
-		}
 		if len(infos) == 0 {
 			t.Fatal("detected smart contract folder with no contract in it")
 		}
-		filename := infos[0].Name()
+
+		filename := filterFilename(infos)
 		targetPath := path.Join(examplePath, info.Name(), filename)
 		if err := compileFile(targetPath); err != nil {
 			t.Fatal(err)
@@ -36,6 +34,15 @@ func TestExamplesFolder(t *testing.T) {
 	}
 }
 
+func filterFilename(infos []os.FileInfo) string {
+	for _, info := range infos {
+		if !info.IsDir() {
+			return info.Name()
+		}
+	}
+	return ""
+}
+
 func compileFile(src string) error {
 	o := compiler.Options{
 		Outfile: "tmp/contract.avm",