<ol> elements should only contain <li> elements

This was causing issues on Chrome because lol browsers.
Merge pull request #12 from leocassarani/patch-4

<ol> elements should only contain <li> elements
Remove bogus "30px" at the end of #logo rule

Or else the logo won't be centred.
Merge pull request #13 from leocassarani/patch-5

Remove bogus "30px" at the end of #logo rule
Fixes twitter account name
Merge pull request #15 from pvcarrera/patch-1

Fixes twitter account name
lesson3 layout
corrected indentation
small reformatting, add logo to common resources
wip: content of 3rd tutorial example
add highlighted content
images
Merge branch 'lesson3' of github.com:codebar/tutorials into lesson3
more content…
link important content
Merge branch 'lesson3' of github.com:codebar/tutorials into lesson3
rename images to not include chevrons
styles adjusted to content
minor fixes
remove unnecessary setting of top padding