Stub in `Base32` migration to `EncoderDecoder`

Part 1 of #41

Wanted a "check point" here, as before continuing with the actual encoding/decoding implementation, #48 needs to be taken care of.

This PR:

Stubs in the implementation for Base32 encoding
Reworks the builder patter for Base16
- Found that when stubbing in things for the Base32 implementation, some things were off and to remain consistent across modules, needed to update it.
Renames EncoderDecoder.Configuration -> EncoderDecoder.Config
Cleans up documentation & code

05nelsonm / encoding