Release 0.3.4

• Change Hello::Model to raise ArgumentError instead of RuntimeError.
• Fix wrong test data.

Release 0.3.3

• Add _setenv.sh.

Release 0.3.2

• Fix 'release:wizard' task.

Release 0.3.1

• Add Gemfile.

Release 0.3.0

• Rewrite lib/hello.rb.
• Add rake/*_task.rb files.
• Define new help task which is a default task.
• Define new task:all task which runs tests on multiple Ruby versions.
• Define new clean task instead of using rake/clean.
• Define new release:wizard task.
• Rename howto task to release:howto.
• Rename package task to gem:build.
• Rename release task to gem:publish.
• Include user account name into gemspec file.

v0.2.1

add 'howto' task

v0.2.0

update Rakefile