Implements resque for staging deployment

Updates notification mailer to use referential ID instead of object.

Adds conditional precompile:assets via gem

Utilizing capistrano-resque gem from our github repo due to failing hangup signal
Merge branch 'master' into resque_to_the_rescue
Updates resque initializer to ignore yml file in test environment
Includes example resque.yml file
Merge pull request #13 from GSA-OCSIT/resque_to_the_rescue

Implements resque for staging environment