fixedd error return and added entry to .gitignore

.gitignore

 integration-test/node_modules
 src/.idea
+.idea

src/engine.go

@@ -61,7 +61,7 @@ func (e *EngineUTF8Data) GetUTF8() string {
 }
 
 func (e *EngineUTF8Data) GetBindata() ([]byte, error) {
-	return []byte(e.Data), errors.New("Data is not binary")
+	return []byte(e.Data), nil
 }
 
 func (e *EngineUTF8Data) IsEmpty() bool {