Merge branch 'feature/improvinf_part1'

* feature/improvinf_part1:
  expanding upon string
  adding sorting problem
  Update README.md
  Update session3.md
  adding more items to be covered on session 3
  completed first pass at fibonacci
Merge branch 'master' into feature/improvinf_part1

* master:
Merge branch 'master' of https://github.com/AlgoCollateral-OSS/SharpBeginnings

* 'master' of https://github.com/AlgoCollateral-OSS/SharpBeginnings:
Merge branch 'master' into feature/improvinf_part1

* master:
cleaned up the code and added more assignments
Merge branch 'feature/improvinf_part1'

* feature/improvinf_part1:
  cleaned up the code and added more assignments
Merge pull request #2 from bhameyie/master

adding additional stories