Added module and fixnum extension to one_million.rb
changed README
refactored into module and tests pass
changed method name
added and tested all unique words below one hundred
added conversion for all integers below one_hundred
refactored methods into single responsibility
added tests for multiples of one hundred
prepended mixin but some tests still broken
all tests pass
added tests for all integers below 1000
all tests pass
IntegerConverter converts all numbers up to 999999
added edge cases & refactored