EVA

This commit brings cernan to the first in the 0.6.0 series, EVA. Since 0.5.10 we've done a fair bit of work on making cernan internals more uniform and easier to maintain going forward.

• c0ec2d7 :: serde 1.0 introduced, configuration parsing overhauled
• 412a426 :: self-telemetry names no longer mangled into graphite form
• 96428b7 :: console sink now emits log lines
• 6d91a3d :: validation for wavefront configuration
• 54e0f7f :: direct elasticsearch integration introduced

A good chunk of this work was completed by Tollef Fog Heen. Thanks so much, Tollef!