fix download link
Brief introduction to version control
Merge pull request #32 from despo/introduction-to-version-control

Brief introduction to version control
introduction to vc - feedback
Merge pull request #33 from despo/feedback-and-extend-bonus

introduction to vc - feedback
Merge pull request #31 from codebar/fix-download-link-lesson-6

fix download link
Update earliest date of wikipedia entry, it should be 2005 not 2007
Add note about logging in with Google
fix markdown list
fix, this is not working in the latest version of chrome
add Introduction to Javascript
Merge pull request #34 from codebar/intro-to-javascript

add Introduction to Javascript
#content, not #container
typo
add missed closing </p>
Erroneous it's
header not .header
typo
Merge pull request #35 from samsworldofno/lesson-4-corrections

Lesson 4 corrections
Fix a bunch of issues (mostly semicolons)