BEncode format serialization-deserialization in Java

[Bencoding specification] (https://wiki.theory.org/BitTorrentSpecification#Bencoding)

Entry point is in [BEncode class] (https://github.com/vacuumn/bencode-SerDe/blob/master/src/main/java/com/github/vacuumn/bencode/BEncode.java), for usage examples see [BEncodeTest] (https://github.com/vacuumn/bencode-SerDe/blob/master/src/test/java/com/github/vacuumn/bencode/BEncodeTest.java).