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

Update CHANGELOG.md

Merge pull request getredash#1559 from getredash/new_upgrade

New and shiny upgrade script

Update release date of 0.12.0.

Fix build configuration

Merge pull request getredash#1167 from ariarijp/fix-bootstrap-script-…

…for-ubuntu

Fix the version of setuptools on bootstrap script for Ubuntu

Update CirlceCI config to build hotfix branch

Bump version.

Merge pull request getredash#1017 from getredash/fix/ds_cli

Add data source to default group when creating with CLI

Merge pull request getredash#882 from tsibley/new-data-source-via-cli

CLI: Restore ability to pass JSON options string for a new data source