Release 0.17.0

Fix various logging issues revealed by PaaS deployment

Upgrade our CI/CD process

switching to circleci 2.0

Fix various data races in events tests

Specify log15 time key

Add documentation and changelog for 0.17.0

Make sure we log somewhere if no config supplied

Revert SELFDESTRUCT fix

Revert "clean up storage and account tombstones from BlockCache when account removal has occurred, for example after SELFDESTRUCT"

This reverts commit 288737d6.

Only push tagged version to their quay.io label

Some missing commits from master needed for clean merge on develop

Port changes from master

apply the megacheck code vet tool

fixes #619

Step back from the notion of two independent logging channels

Remove hell

channels. Adds a lot of complexity and the same value can be
better satisfied by the sinks mechanism (just filter).

Remove hell since factored out and improved on in https://github.com/silasdavis/glide-lock-transitive

Remove module versioning

client websocket: add missing verb to error message

Implement dynamic memory and fix out of bounds issues

fix error formatting

Clean up storage and account tombstones from BlockCache 

clean up storage and account tombstones from BlockCache when account removal has occurred, for example after SELFDESTRUCT

Change hasBase to return bool