Bump chef-gem to 11.6.0

(This enables lazy attributes)
Updated CA Certs bundle.  Note the version number did not change in the
file, so we just appended a -1 on the version.

From http://curl.haxx.se/ca/ :

August 4th, 2013 -
The cacert.pem output now only contains certificates that are explicity
marked as trusted. The script was updated in commit 51f0b798fa as a
response to the 1.84 revision update of certdata.txt from June 2012.
Merge branch 'new-cacerts-distro'
Merge branch 'cm/update_chef'