Fix Typo on Slide 28

Middle example was missing “Paragraph 2</p>”
Fixed Typo Slide 76

Removed extra class=green example
Fixed Typo Slides 5 and 6

Updated the color from purple to green in order to have it match the
example
Fixed typo slide 16

Corrected capitalization
Fix formatting slide 19 part 1

put third example in it’s own <pre></pre> field
Merge pull request #2 from mafriend/approved

Fixing minor typos on several different slides