Update circle.yml for our workflow

Bump version.

ADd changelog entry for favicons fix

remove compare query trigger

Fix: handle the case when a scheduled query wasn't run before

Update CHANGELOG.md

Exponential backoff for failing queries

Merge pull request getredash#1559 from getredash/new_upgrade

New and shiny upgrade script

Bump version to 1.0.0.

Update release date of 0.12.0.