Built for a healthcare application. A simple gem to set the age category of a user given a date of birth. Given a string representation of date of birth in the format yyyy-mm-dd. e.g; AgeGroup.setAgeCategory(1990-01-01) will return "Young Adult" as their age category. Age Ranges: 0-2 > "Infant", 3-5 > "Young Child", 7-12 > "Child", 13-17 > "Teen", 18-30 > "Young Adult", 31-45 > "Middle Aged", 46-64 > "Mature Adult", 65+ > "Elderly"