* For Ruby 2.2, use a new Gemfile named Gemfile.travis-ruby2.2 that include 'gem "test-unit"' line because test/unit have been provided by bundled gem since Ruby 2.2.
* Bump up version to 1.5.0-dev (220.127.116.1150630) * Simplify the versioning rules. * We will adopt the Semantic Versioning since BioRuby 1.5.1.
* Bio::SOAPWSDL is removed because SOAP4R (SOAP/WSDL library in Ruby) is no longer bundled with Ruby since Ruby 1.9. For Ruby 1.9 or later, some gems of SOAP4R are available, but we think they are not well-maintained. Moreover, many SOAP servers have been retired (see previous commits). So, we give up maintaining Bio::SOAPWSDL.
* extconf.rb is deleted because no native extensions are included in BioRuby and to avoid potential confusions. Nowadays, extconf.rb is usually used only for building native extensions. Use gem or setup.rb to install BioRuby.