* gemfiles/Gemfile.travis-rbx: Gemfile for rbx (Rubinius) on Travis-ci * .travis.yml is modified to use gemfile/Gemfile.travis-rbx for rbx.
* Remove ruby version 1.9.2 from matrix for reducing builds * Add tar/gem integration tests * Add a new helper script gemfiles/modify-Gemfile.rb, modifying gemfile when running gem integration test. * Remove jruby version comments
The travis-ci Gemfiles currently call for libxml-jruby; this appears not to support the same API as libxml-ruby, resulting in several tests in test/unit/bio/db/test_phyloxml.rb failing with "NameError: uninitialized constant LibXMLJRuby::XML::Parser::Options". Switching to the C libxml-ruby library allows these tests to pass under JRuby in 1.8 mode. JRuby in 1.9 mode still fails a few PhyloXML tests due to https://jira.codehaus.org/browse/JRUBY-6662.
* travis-ci: soap4r-ruby1.9 gem in Gemfile.travis-ruby1.9 and Gemfile.travis-jruby1.9 is commented out because of an error "uninitialized constant XML::SaxParser".