[~TASK] Queuing each message
[~TASK] Update the send method of the datadog channel
[~TASK] Change the default value's value
[+FEATURE] Add prefix on each statistic key

The prefix is "magento.website.group.store".

Conflicts:
	app/code/community/Hackathon/Metrics/Model/Queue.php
[+FEATURE] added page view tracking with action name