v0.7

Features:

• Improved error handling on list download
• Fine grained locking on list update
• improved selection of external resolver: weighted random based on last error status

Bugfix:

• IP6 upstream with port can be configured now (thanks @timeforcode)

Misc

• Docker-compose: example configuration for Grafana and Prometheus (thanks @lakestonelabs), setting default values (thanks @izzeho)
• Moved some content from README to Wiki
• Tests rewrite: Use Ginkgo as BDD test framework
• Updated dependencies