Rename methods for serialization and deseirialization.
Separate functions for serialization and deserialization from "trie.go".
Make the method for serialization a function.
"binary.Writer" and "binary.Reader" make it easy to hadle errors.
Use "binary.Reader" and "binary.Writer" in serialization and deserialization of "Trie".
Change the order of serialization.
Split "predictor.Dump" into three functions: "predictor.Dump", "predictor.dumpValueSeq" and "predictor.dumpValue".
Use "binary.Reader" and "binary.Writer" for serialization and deserialization of "Predictor".
Fix: Convert a value typed as int to one typed as int64.
Fix: Remove a duplicated code.
Merge branch 'feature/refactor-dump-and-load'