1.8.7/1.9.2 are unsupported and 1.9.3 is soon unsupported.

I updated the end of life status of 1.9.2 and 1.8.7 and the soon to be EOL 1.9.3 status.

I was surprised to see 1.8.7 still in the .travis.yml and the README.

Is anyone really still using 1.8.7 with fog?

Can I also remove this?

```
With this caveat, if you wish to bundle `fog` into your application on Ruby
1.8.7, you must add the following line to your `Gemfile`.

ruby
gem 'nokogiri', '~>1.5.0'
```

This doesn't remove 1.8.7/1.9.2 support but would not enable it.