Make Kaiser work on ARM macs

[davidsiaw]

Bunch of upgrades to bring kaiser into the new century. Kaiser had encountered some strange difficulties including

• not working chrome testing on arm (strange crashing every once in a while)
• not starting some applications mysteriously (because they cant start on ARM)
• mysterious failures with new system ruby

hence this PR:

Update to 3.0
Thanks to my nice ARM pc now I got everything working real nice
Make the chrome work for both ARM and AMD64 procs

How to test (or trust me completely):

1. check out this repo and this branch git clone https://github.com/degica/kaiser && cd kaiser && git checkout add-build-platform
2. rake build
3. go to somewhere like HATS and go gem install ../kaiser/pkg/kaiser-0.7.0.gem
4. kaiser init hats and kaiser up -av
5. go to http://hats.lvh.me in your browser

should work

Test testing

1. kaiser up -av bash
2. rspec spec/features
3. use your favorite VNC tool and go to localhost:5900 with the password secret and see the tests running

[degikko]

@yunshine can you help us review this PR, please?

[yunshine]

Thanks for helping me out with the testing! LGTM!