Add dalli/memcached support
rename fetch method to fetch_listings
Oops, didn't actually comment out the destroy method in fetch_listings.
Add pry to development group in Gemfile
Save scraped CL postings into array, then save them all in one swoop with create
Move fetch_listings method into the model so we can cache the result with memcached. Default cache time is 24 hours.
Setup dalli/memcached in production and development environments
Remove fetch_listings from controller entirely; now handled in model. @items pulls from memcached first and after 24h will rescrape CL.