[#111] Fix Travis builds

 * use a custom Gemfile without guard for travis
 * use old style hash, almost forgot about hash rockets :)
 * use only rbx-2
Merge pull request #112 from bramswenson/fix_travis_builds

[#111] use a custom Gemfile without guard for travis
[#100] - fixes ssl deprecation warning in > 2.0
Merge pull request #113 from bramswenson/fix_openssl_deprecation

[#100] - fixes ssl deprecation warning in > 2.0