serialization library built with a combinator design similar to the nom parser combinators library.
Serializers are built up from single purpose serializers, like slice
to write a raw byte slice, or be_u16 to write a u16 integer in big
endian form.
Those small serializers can then be assembled by using combinators.
As an example, all(["abcd", "efgh", "ijkl"].iter().map(string))(output)
will write "abcdefghijkl" to output.