Code beautification

Signed-off-by: Ricardo Leitão <rleitao@lqd.io>
Fix concurrency issues in event tracking

Signed-off-by: Ricardo Leitão <rleitao@lqd.io>
Fix NullPointerException when device doesn't have network chip

Signed-off-by: Ricardo Leitão <rleitao@lqd.io>
Convert tabs to spaces :trollface:

Signed-off-by: Ricardo Leitão <rleitao@lqd.io>
Keep the anonymous user when trying to identify with id = null

Signed-off-by: Ricardo Leitão <rleitao@lqd.io>
Release Liquid v0.8.3-beta

Signed-off-by: Ricardo Leitão <rleitao@lqd.io>