Add [libnumtext_]text2num: text to digits, with analysis (possible flags from num2text)
Add [libnumtext_]card2ord: convert cardinal in digits to ordinal in digits with necessary text (like superiors in English)
Add num2text: conversion utility that wraps libnumtext_num2text
Add numtext-strip: utility that wraps libnumtext_remove_separators
Add man pages and README