feat: getDifferenceInMonths that takes in string parameters
feat: getDIM() that takes in Date() parameters
refactor: remove extra variables
refactor: rename to fit consistency
feat: docs within month if block
feat: include dates library
refactor: delete getDifferenceInMonths() that accepts string as parameters and followed calculation similar to weeks
feat: include date.js in template
refactor: rename DIM as difference in months
feat: month if block - calculates difference in months
feat: calculate initial period
feat: call addColumns with correct period values