submission of strtok tutorial
This is not necessarily the final submission, I am just submitting this in
     case my request for another extension does't go through.
Update README.md

Minor change to an eample

Minor fixes in README

Minor edit to README

moved section

remade changes

Minor edit to README

Changed escaped literals to character classes

Minor edit to README

clarification
final update to macro README.md from feedback
final hw4 submission
HW4-Test Cases
addressed the problems with my hw4
Merge pull request #656 from asand017/cs100-2014fall

Updated sed Tutorial - hw4 resubmit
changed up advanced-git tutorial README.md for hw4
Merge pull request #647 from thinkaliker/regexfixed

HW4: Updated Regex guide
Merge pull request #649 from khuan013/cs100-2014fall

Final update for HW4 Macros Tutorial
Merge pull request #650 from khiguera/cs100-2014fall

final hw4 submission
Merge pull request #662 from Dave864/cs100-2014fall

Request for review of strtok tutorial
Merge pull request #653 from gbrlrz017/cs100-2014fall

HW4-Test Cases
Merge pull request #651 from mxu008/cs100-2014fall

HW4: Fixed the beginning and follow the comments
Merge pull request #658 from ChemicalWonders/cs100-2014fall

changed up advanced-git tutorial README.md for hw4