Some words about encoding

docs/Encoding.md

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+# Encoding
+
+The `bitcore.Encoding` namespace contains utilities for encoding information in
+common formats in the bitcoin ecosystem.
+
+## Base58
+
+Two classes are provided: `Base58` and `Base58Check`. The first one merely
+encodes/decodes a set of bytes in base58 format. The second one will also take
+the double `sha256` hash of the information and append the last 4 bytes of the
+hash as a checksum when encoding, and checking this checksum when decoding.
+
+## BufferReader & BufferWriter
+
+These classes are used internally to write information in buffers.
+
+## Varint
+
+The bitcore implementation uses a quite complex way of compressing integers
+representing the size of fields.