Update README.md
Add Ruby.Enumerable, Ruby.Enumerator & Ruby.LazyEnumerator interfaces
Add rewind() and peek() to Ruby.Enumerator interface
Add RubyTest
Update JavaDoc
Add test
Add RubySet
Remove deprecated methods
Add RubySetTest
Update JavaDoc
Update README.md
Add @SafeVarargs
Remove newRubyRange
Trim codes
Expend RubyDate API
Change RubyDate::now to RubyDate::current
Update README.md
Add RubyArray#flatten(int)