Tom turning in string problems 1-4
problems 1 and 2 from lists
standardize tests
string problems 5 and 6
list problems 3 and 4
Merge branch 'master' of https://github.com/dabaitu/300 into tom

* 'master' of https://github.com/dabaitu/300:
  3 more linked list problems
list problems 5 and 7
Merge branch 'master' of https://github.com/dabaitu/300 into tom

* 'master' of https://github.com/dabaitu/300:
  more problems
stuff
Merge pull request #1 from dabaitu/tom

Tom