rubygems and bundler best practices

- Moved development dependencies to gemspec, cleaning up Gemfile
- Removed Gemfile.lock (should not be checked in to git for libs/gems)
- Updated specs to remove rspec deprecation messages
- Removed test in opt_verify_spec.rb that was not working without deprecated rspec methods
  and was implicitly contained in the next spec anyway.
cleaning up newlines
removing bundler args from travis config

Missing part of the gemspec and bundler cleanup.
Cleaning up rubies, rubinius support

No more 1.8.7, added support for rbx stdlib in Gemfile.
Merge pull request #19 from halfbyte/bundler_and_gemspec_fixes

rubygems and bundler best practices