Allow forcing log

Rakefile

 end
 
 task 'scrape' do
-  scraper = Scraper.new(log: ENV['APP_ENV'] == 'development')
+  should_log = ENV['APP_ENV'] == 'development' || ARGV.include?('--log')
+  scraper = Scraper.new(log: should_log)
   scraper.scrape
 end