RockIt is not available for next Wednesday
Change a ruby-doc.org link to Ruby 2.1
Fix some typos
Merge pull request #15 from dkeranov/02-fix-typos

Fix typos in lecture 2 on slides 8 and 11
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Add a note that APIDock is a bit outdated (lecture 02)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.
Merge pull request #16 from fmi/01-fix-typos

Fix typos in lecture 01
Add lecture 03
Fixed style error

Using unless with else where the style guide states that we should not.
Merge pull request #17 from NikolayGenov/03-fix-style

Fixed style error