1.2.0

Removed bottlenecks

Elixometer's main gen_server was creating a bottleneck, since it waited for responses from exometer in order to update a stat. This version changes the architecture somewhat such that updating stats is asynchronous and the process that receives the messages has a cap of 1000 messages in its inbox.

It's worth noting that this bottleneck would only occur under extremely high load situations that would send hundreds of thousands of stats per second.