removed unneeded returns in cli.rs
move cli help to cli.rs from util.rs
renamed console.rs & console to repl.rs & repl
updated docs to reflect above change
removed unused code in date.rs
reworked string_to_digits in date.rs
removed unused imports in main.rs
move all checks into one match in main.rs
renamed until.rs to util.rs
reworked norm_digits in util.rs to handle numbers greater then 25 when more then 5 numbers are provided