Moved "rake" and "rspec" to development dependency entry.
Merged git://gist.github.com/1297022.git
Merge branch 'develop' of github.com:kiyoka/nendo into develop
Add `ruby-lazy' form for Enumerable::Lazy object
Add `lazy-vector` function and test-suite for it
Add example code for lazy-vector
Update version number
Add `ruby-head' to travis-ci configuration file
lazy-vector support for `fold` function
Remove `ruby-prof` gem dependency from Gemfile.lock
Add example programs for `fold' and `lazy-vector'
Change message of test-suite for `lazy-vector'