RockIt is not available for next Wednesday
Change a ruby-doc.org link to Ruby 2.1
Fix some typos
Minor text correction in lecture 02
Remove an extra blank line
Add a note that APIDock is a bit outdated (lecture 02)
Add a missing backtick in lecture 02
Use `list:` instead of manually describing the HTML
Fix typos in lecture 01

Someone doesn't know how to spell.
Maybe it's @mitio...
Remove an exclamation mark

Apparently we shouldn't be exited.
Add lecture 03
Fixed style error

Using unless with else where the style guide states that we should not.
Merge branch 'master' of https://github.com/dkeranov/ruby-lectures