add custom capistrano sidekiq hooks
use REDIS_URL env variable in staging too
add sidekiq initialiser to set custom redis url
Merge branch 'master' into custom-capistrano-sidekiq

Conflicts:
	config/deploy.rb
add on roles clause to monit restart in capistrano
Merge pull request #131 from unepwcmc/custom-capistrano-sidekiq

Custom capistrano hooks for sidekiq, ENV['REDIS_URL'] in staging too