modified dog to learn tricks and quick logic overview
* 'master' of github.com:varkerkamachi/RLO:
  adding week 2 challenge

Conflicts:
	4week/1e_dog.rb
* 'master' of github.com:varkerkamachi/RLO:
  reworking granny for week 4. partial test coverage
  adding doctest for rectangle class.
  updating logic challenge