(maint) Making command debug output more readable.

Making the output of executed commands more readable by adding a newline
character so that the first line of the output isn't printed along with
the DEBUG message.
(CFACT-11) Add system profiler facts for OSX.

Adding the system profiler (sp_*) facts for OSX.
(CFACT-11) Add macosx_* version facts.

Adding the MacOSX version facts.
Merge pull request #51 from peterhuene/facts/osx

(CFACT-11) Implement OSX facts.