- added new class RawBase64String
- moved methods rawFromBytes, rawFromText, rawToBytes and rawToText to the new class RawBase64String and renamed them as encodeBytes, encodeText, decodeAsBytes and decodeAsText
- added methods encode and decode to RawBase64String
- renamed methods fromBytes, fromText, toBytes and toText of the Base64String class as encodeBytes, encodeText, decodeAsBytes and decodeAsText
- added methods encode and decode to Base64String
- renamed ReliableTxtDocument.getBytes to toBytes
- added Utf16String.getUtf8ByteCount
- switched package type to ES module