add unicorn metrics
Merge pull request #774 from antonlindstrom/plugin/unicorn

add unicorn metrics
Add mackerel handler
fix rubocop
Merge pull request #777 from kenjiskywalker/add-mackerel-handler

Add mackerel handler
Add memory.swapUsedPercentage metric
Merge pull request #780 from cluePrints/memory-swap-used-percentage

Add memory.swapUsedPercentage metric
ohai_time is an attribute, not a method

ohai_time is an undefined method in later versions of the chef gem
Merge pull request #791 from srodrig0209/patch-5

ohai_time is an attribute, not a method