Change default in listen block to default_server.

Using just default in listen is outdated and should be default_server.
For more see
http://nginx.org/en/docs/http/ngx_http_core_module.html#listen
Merge pull request #20 from puppetlabs-operations/default_server

Change default in listen block to default_server.
Add multi loadbalancer support.

Setup a way to include two loadbalancer classes. the upstream workers is
now workers-${name} and nginx::loadbalancer has support to define if it
is the default vhost.
Merge pull request #21 from puppetlabs-operations/multi_vhost

Add multi loadbalancer support.
Add sslonly parameter to proxy
Ensure /var/log/nginx directory and logs are created.

Nginx will not create its own logs directory and log files itself.
Ensure they are created and owned properly when installed.
Add more SSL configuration parameters

Add ssl_{ciphers, protocols, ca, crl_path, verify_client} options to
vhost templates and related classes.
Merge pull request #23 from geoffgarside/ssl-params

Add more SSL configuration parameters
Merge pull request #22 from geoffgarside/log-files

Ensure /var/log/nginx directory and logs files are created.
Fixing merge conflict in unicorn.pp. Removed client_max_body parameter.