[GH-36] - Removed restriction on input types
[GH-36] - Removed restriction on input types

*updated inputs.conf.erb to allow for any type of input to be used
*added example and explanation in readme
*fixed a typo in own commit

Signed-off-by: Emir Rios <6b9720129e62b1b48664104493ca94b8e62fa8c4@gmail.com>

chef-cookbooks/chef-splunk,chef-cookbooks/chef-splunk,chef-cookbooks/chef-splunk