Nicely formatted Reference.

format (Reference Genesis 1 1 1 1 ) --> "Genesis 1:1"


format (Reference Genesis 1 1 11 5 ) --> "Genesis 1:1-11:5"

Parse any references in a string.

fromString "Gen 1:1" --> [ Ok <| Reference Genesis 1 1 1 1]


fromString "Gen 1:1, Exodus 1, Luke 10:16, Acts 28:100" -->
    [Ok <| Reference Genesis 1 1 1 1
    ,Ok <| Reference Exodus 1 1 1 22
    ,Ok <| Reference  Luke 10 16 10 16
    ,Err "Invalid end verse"
    ]

Generate a Reference and check it is valid

reference Genesis 1 1 1 1 --> Ok <| Reference Genesis 1 1 1 1


reference Genesis 1 1 51 1 --> Err "End chapter invalid"

Check how many chapters are in a Book

numChapters Genesis --> 50


numChapters Jude --> 1

Check how many verses are in a chapter of a Book

numVerses Genesis 50 --> 26


numVerses Psalms 119 --> 176

Describes a Bible Reference

`Reference book startChapter startVerse endChapter endVerse`