Add a script of building test-environment
Add stat-aggregator
Fix incorrect order
Revise storing and retrieving destinations
Implement fetch-function in data-handler(50%)
Implement fetch-function(75%)
Modify consumption interval for the tests
Support data replication
Add Cowboy as HTTP-Server
Support plug-able mechanism
Remove unnecessary keys
Update for v0.4.1
Roll dnbl_stat version 0.4.1
Merge branch 'release/0.4.1'