Providing Map#drop (by key or value) and Map#take functionality for nested maps

Useful Erlang Functions Library

Influenced by Rails Activesupport::Inflector, Digger uses protocols to handle some common data transformation operations such as snake_casing, camelCasing, lower/upper casing the first letter, converting strings to atoms and other operations I've found myself doing in Elixir

Get, set, update, and save nested maps using dot notation.