v0.96.0

unicorn 0.96.0 - Rack 1.1 bump

This release includes small changes for things allowed by Rack
1.1.  It is also now easier to detect if daemonized process
fails to start.  Manpages received some minor updates as well.

Rack 1.1 allowed us to make the following environment changes:

* "rack.logger" is now set to the "logger" specified in
  the Unicorn config file.  This defaults to a Logger
  instance pointing to $stderr.

* "rack.version" is now at [1,1].  Unicorn remains
  compatible with previous Rack versions if your app
  depends on it.

While only specified since Rack 1.1, Unicorn has always exposed
"rack.input" in binary mode (and has ridiculous integration
tests that go outside of Ruby to prove it!).