Fix syslog example for custom configuration in client.d

As it was, nobody would be able to get the example to work. Better to show people the full solution in the example than just frustrate them with a non-working 90% code.
Merge pull request #111 from jblaine/patch-1

[COOK-3373] Fix syslog example for custom configuration in client.d
Fix MiniTest cron test for valid attributes

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
Fix whitespace
Reformat CHANGELOG
Update CHANGELOG format
Fix README format
Version bump to v3.0.6
Bump devodd release