role installed

This rolls back to commit 582183c2566d5b4d57cb8d3a4f155f5abc597e19.
Products#show refactored

Change relations to items controller, imroved partials logic
User.current to model

Added User.current to model
Layout Recipes#show improved

Recipes#show and partials:
add item, increase and produce cleared and bootstrapped.
Products show tabs too
Merge branch 'role'