Include the runit recipe in the default cassandra recipe

Otherwise I keep getting this error: 

```
================================================================================
Error executing action `enable` on resource 'runit_service[cassandra]'
================================================================================
 
RuntimeError
------------
Could not locate main runit sv_bin at "/usr/bin/sv". Did you remember to install runit before declaring a "runit_service" resource? 
 
Try adding the following to the top of your recipe:
 
include_recipe "runit"
 
Resource Declaration:
---------------------
# In /tmp/chef-solo/cookbooks/cassandra/recipes/default.rb
 
 82: runit_service "cassandra" do
 83:   default_logger true
 84:   if node[:cassandra][:max_heap_size] && node[:cassandra][:heap_newsize]
 85:     options({
 86:       :has_env => true
 87:     })
 88:     env({
 89:       "MAX_HEAP_SIZE" => node[:cassandra][:max_heap_size],
 90:       "HEAP_NEWSIZE" => node[:cassandra][:heap_newsize]
 91:     })
 92:   end
 93: end
 
Compiled Resource:
------------------
# Declared in /tmp/chef-solo/cookbooks/cassandra/recipes/default.rb:82:in `from_file'
 
runit_service("cassandra") do
  log true
  service_dir "/etc/service"
  retry_delay 2
  log_template_name "cassandra"
  sv_bin "/usr/bin/sv"
  provider Chef::Provider::Service::Runit
  cookbook_name :cassandra
  sv_templates true
  startup_type :automatic
  retries 0
  run_template_name "cassandra"
  status_command "/usr/bin/sv status /etc/service"
  service_name "cassandra"
  sv_dir "/etc/sv"
  pattern "cassandra"
  default_logger true
  action :enable
  service_mirror # Declared in 
 
service("cassandra") do
  retry_delay 2
  restart_command "/usr/bin/sv restart /etc/service/cassandra"
  provider Chef::Provider::Service::Simple
  startup_type :automatic
  retries 0
  stop_command "/usr/bin/sv stop /etc/service/cassandra"
  status_command "/usr/bin/sv status /etc/service/cassandra"
  service_name "cassandra"
  pattern "cassandra"
  start_command "/usr/bin/sv start /etc/service/cassandra"
  action [:nothing]
  supports {:status=>true, :reload=>true, :restart=>true}
end
 
  finish_script_template_name "cassandra"
  supports {:status=>true, :reload=>true, :restart=>true}
  recipe_name "default"
end
 
[Thu, 21 Feb 2013 13:50:07 -0800] ERROR: Running exception handlers
[Thu, 21 Feb 2013 13:50:08 -0800] ERROR: Exception handlers complete
[Thu, 21 Feb 2013 13:50:08 -0800] FATAL: Stacktrace dumped to /tmp/chef-solo/cache/chef-stacktrace.out
[Thu, 21 Feb 2013 13:50:08 -0800] FATAL: RuntimeError: runit_service[cassandra] (cassandra::default line 82) had an error: RuntimeError: Could not locate main runit sv_bin at "/usr/bin/sv". Did you remember to install runit before declaring a "runit_service" resource? 
 
Try adding the following to the top of your recipe:
 
include_recipe "runit"
```