Code fix (Update README.rdoc)

Applied correct tags to display "gem install rake" as code in rdoc.
Don't answer the first few questions (#120)

https://github.com/neo/ruby_koans/pull/120
Merge pull request #119 from harshadsabne/master

Code fix (Update README.rdoc)
Remove require_relative (#117)

Require relative is only available in modern rubies. Let's keep this
working on some of the older versions as well.

https://github.com/neo/ruby_koans/pull/117
Updated the zip file.
Fix typo in Rakefile
Added clarification note about sending messages.
Fix 'accidental' solving of first 3 koans
That was weird, done for real now?
Merge remote-tracking branch 'upstream/master'