Removed extra document files.
Modified the LICENSE file.
Added ariete.gemspec
Using rspec in Rakefile.
Rewrited test codes from test/unit to rspec.
Added .travis.yml
Added a copyright into lib/ariete.rb
Rewrited README.md
Enabled module_function.
Added license to ariete_spec.rb
v0.3.0
Merge branch 'release/v0.3.0'