add rake cache to .gitignore
add rake cache to .gitignore

wanix/showoff,berkes/showoff,marrero984/showoff,kublaj/showoff,slambert/showoff,marrero984/showoff,binford2k/showoff,wanix/showoff,kublaj/showoff,puppetlabs/showoff,kublaj/showoff,slambert/showoff,kublaj/showoff,kublaj/showoff,binford2k/showoff,slambert/showoff,berkes/showoff,berkes/showoff,binford2k/showoff,slambert/showoff,berkes/showoff,wanix/showoff,binford2k/showoff,marrero984/showoff,puppetlabs/showoff,marrero984/showoff,berkes/showoff,puppetlabs/showoff,puppetlabs/showoff