lucasmartins/mailcannon — pull request #4 by lucasmartins (2014-03-12 15:12:25+00:00)
Title: S10 reduce envelope

Implemented JS MapReduce for MongoDB:

```ruby
{
"posted"=>{"count"=>0.0, "leads"=>[]},
"processed"=>{"count"=>0.0, "leads"=>[]},
"delivered"=>{"count"=>1.0, "leads"=>["1"]},
"open"=>{"count"=>1.0, "leads"=>["2"]},
"click"=>{"count"=>0.0, "leads"=>[]},
"deferred"=>{"count"=>0.0, "leads"=>[]},
"spam_report"=>{"count"=>0.0, "leads"=>[]},
"spam"=>{"count"=>0.0, "leads"=>[]},
"unsubscribe"=>{"count"=>0.0, "leads"=>[]},
"drop"=>{"count"=>0.0, "leads"=>[]},
"bounce"=>{"count"=>1.0, "leads"=>["3"]}}
```