Documentation - Add tomdoc to classes

[gil27]

In order to help contributors. We would love ❤️ to add some code documentation like TomDoc

eg:

# Public: Duplicate some text an arbitrary number of times.
#
# text  - The String to be duplicated.
# count - The Integer number of times to duplicate the text.
#
# Examples
#
#   multiplex('Tom', 4)
#   # => 'TomTomTomTom'
#
# Returns the duplicated String.
def multiplex(text, count)
  text * count
end

[yamishi13]

I'll take this if it's ok for you

[gil27]

Thanks a lot @yamishi13