add trusted hosts setting for gmetad, defaults to 127.0.0.1
adapt @maplebed's suggestion to leave this unset when the chef attr is unset.
default trusted_hosts to nil.
Update gmetad.conf.erb

match previous content
specify specific versions such that foodcritic gets upgraded without gem conflicts
Converting README to markdown per FC011
typos and missing markup
adding some to the Testing section of the README
changes to support FC001
Merge pull request #29 from ganglia/ben.upgrade_foodcritic

specify specific versions such that foodcritic gets upgraded without gem conflicts
Merge pull request #28 from bitmonk/gmetad_trust

add trusted hosts setting for gmetad, defaults to 127.0.0.1
Merge pull request #30 from ganglia/ben.foodcritic

Fixing FC011 - convert README to markdown
Merge remote-tracking branch 'origin/master' into ben.FC001

Conflicts:
	attributes/ganglia.rb