Log Message:
Update ruby-addressable to 2.3.3.

# Addressable 2.3.3
- fixed issue with converting common primitives during template expansion
- fixed port encoding issue
- removed a few warnings
- normalize should now ignore %2B in query strings
- the IDNA logic should now be handled by libidn in Ruby 1.9
- no template match should now result in nil instead of an empty MatchData
- added license information to gemspec