Update README with type documentation.

[Ziaunys]

• Adds basic documentation for the Class parameters and various types
  that the module provides.

[kfjohnson]

+1

[discreet]

@Ziaunys since you added the documentation i was curious if there is a way to have multiple settings/values for the same section when using the forwarder_input and forwarder_output types.

[Ziaunys]

@discreet You could pass multiple forwarder inputs and outputs to the forwarder_input and forwarder_output parameters since it's just taking those hashes and calling create resources on them. I can update the docs to make that more clear.

[discreet]

@Ziaunys that would be awesome. To clarify though in the params.pp we see this as the default to forwarder_output:

$forwarder_output = {
"tcpout_defaultgroup" => {
section => 'default',
setting => 'defaultGroup',
value => "${server}_${logging_port}",
tag => 'splunk_forwarder'
},

I'm looking to achieve an output.conf like below (*ip addresses removed):

[default]
defaultGroup = SplunkCluster
disabled = false
[tcpout:SplunkClusterProd]
server = $IPone:$port, $IPtwo:$port
useACK = true
maxQueueSize = 7MB