[COOK-1189] Notify rsyslog service to restart on template file change

[COOK-1678] Set default attributes for users depending on version and platform. 

Add default attributes to determine user and group for syslog and whether to use privlege seperation

Also add per-host attribute per ticket comment

forgot to specifiy my COOK its COOK-1167

* Add a CONTRIBUTING file to each cookbook.
* Move the Changes/Roadmap section(s) to CHANGELOG.md.
* Create the Apache LICENSE file in each cookbook.

* no longer uses the rsyslog['server'] attribute to search
* default server role to search for is `loghost`, see README
* change attributes from Ruby symbols to strings
* add a port attribute to specify a port other than 514 (still default)
* extensive README.md updates describing behavior

* consolidate ubuntu rules config
* use a PPA to install rsyslog from lucid on hardy

Chef commit: 82990490
Deprecates remote_file source from the cookbook itself,
uses cookbook_file as the resource instead.

Remote_file still used for retrieving files from an absolute
URI.

* Use 'default.rb' for attributes files when specific files not
  necessary
* Update search in rsyslog recipe.

* Metadata.json can be generated with the rake tasks.
* Use 'metadata[cookbook]' and 'metadata_all' to generate .json.
* Application readme needed a few more clarification points.