Don't use sup-{version,files}.rb
Just use gemspec in Gemfile
Use URL source in Gemfile to avoid warning
`rake :tarball` is not needed. Use `rake pacakge` instead
A shorter summary
A cleaner description
Just use double quotes in gemspec
Remove test files exclusion for test_server.rb
Gem::PackageTask already loads the gemspec
Add main maintainers to gemspec.authors