Release 1.16.0

This release includes several bugfixes, one new feature (compress
requests sent to Honeybadger's servers using the deflate compression
algorithm), and a soft-deprecation of Ruby 1.8.7 and 1.9.2. This gem
version will still work with those Ruby versions, but support in future
versions will not be maintained.

Changelog:

* Compress requests using deflate.
* Fix a bug where context wasn't reported from Sinatra applications
* Fix a bug which affected Rails 3.0 apps
  (`ActiveRecord::Base.connection_config` missing).
* Stop sending non-server env.
* Automatically fork worker when Unicorn forks (removes the need to call
  `Honeybadger::Monitor.worker.fork` in Unicorn's `after_fork` block.)
* Ruby 1.8.7 and 1.9.2 are no longer supported.

Full changelog:

https://github.com/honeybadger-io/honeybadger-ruby/blob/master/CHANGELOG.md