WIP Release 0.9.0

Summary:
WIP

Incompatible Features:
- Remove many default mods that are not normally needed.
- Remove `rewrite_base` `apache::vhost` parameter; did not work anyway.
- Specify dependencies on stdlib >=2.4.0 (this was already the case, but
making explicit)

Features:
- `apache` class
  - Add `httpd_dir` parameter to change the location of the configuration
  files.
  - Add `logroot` parameter to change the logroot
  - Add `ports_file` parameter to changes the `ports.conf` file location
  - Add `keepalive` parameter to enable persistent connections
  - Add `keepalive_timeout` parameter to change the timeout
  - Update `default_mods` to be able to take an array of mods to enable.
- `apache::vhost`
  - Add `wsgi_daemon_process`, `wsgi_process_group`, and `wsgi_script_aliases`
  parameters for per-vhost WSGI configuration.
  - Add `access_log_syslog` parameter to enable syslogging.
  - Add `error_log_syslog` parameter to enable syslogging of errors.
  - Add `directories` hash parameter. Please see README for documentation and
  be aware that this is very likely to change in the next releases.
  - Add `custom_fragment` parameter to allow for arbitrary apache
  - Add `sslproxyengine` parameter to enable SSLProxyEngine
  configuration injection. (Feature pull requests are prefered over using
  this, but it is available in a pinch.)
- Update `apache::mod::wsgi` class for global WSGI configuration with
`wsgi_socket_prefix` and `wsgi_python_home` parameters.
- Add README.passenger.md to document the `apache::mod::passenger` usage.
Added `passenger_high_performance`, `passenger_pool_idle_time`,
`passenger_max_requests`, `passenger_stat_throttle_rate`, `rack_autodetect`,
and `rails_autodetect` parameters.
- Separate the httpd service resource into a new `apache::service` class for
dependency chaining of `Class['apache'] -> <resource> ~>
Class['apache::service']`
- Added `apache::mod::proxy_balancer` class for `apache::balancer`

Bugfixes:
- Change dependency to puppetlabs-concat
- Fix ruby 1.9 bug for `a2mod` (a2mod is unofficially deprecated)
- Change servername to be `$::hostname` if there is no `$::fqdn`
- Make `/etc/ssl/certs` the default ssl certs directory for RedHat non-5.
- Make `php` the default php package for RedHat non-5.
- Made `aliases` able to take a single alias hash instead of requiring an
array.