Merge pull request #3 from xtitter/gh-pages

latest on lesson 2
Cleaning up git #5
Merge branch 'gh-pages' of https://github.com/jmca93/bjc-r into gh-pages
Merge pull request #4 from xtitter/gh-pages

added a step, and a few small fixes
Test Yourself: Random

Created quiz for Topic 2
TestYourself: Random image fixed
TestYourself: Random image fix attempt 2
Merge pull request #7 from jmca93/gh-pages

Test Yourself: Random