update ChangeLog
added ruby-head into allow_failures in travis
update dependency
RSpec 3
used expect syntax
Merge pull request #409 from tdiary/rspec3

RSpec 3 対応
fuzzy matching for 2.1
added rubygems version
fix wrong date
added test-unit into test-group again
converted Ruby 1.9 like hash syntax
remove trailing white space
update PaaS dependencies
bump version to 4.0.3