Update week2/002structureOfADataAnalysis2/index.html

charcters -> characters
Merge pull request #10 from schuess/patch-1

Update week2/002structureOfADataAnalysis2/index.html
Merge pull request #9 from jpoliv/master

Getting Data (Part 2): slide 4 title correction
Added week 3 lectures
Fixed typo in 'continous'
Merge pull request #12 from iemejia/master

Fixed typo in slide 'continous'