doing v1.0

First major release 🎉 This release brings new options, as well as some breaking changes for more consistency with github cli.

For an upgrading guide from 0.x to `1.0, see the upgrade guide. The full list of changes are in this PR.

Changed

• Repository and docs have now moved to a new organization github.com/ing-bank
• doing create pr/issue and doing close pr/issue have been removed, in favor of doing issue create/close and doing pr create/close (#27)
• doing pr create has new defaults for more consistency with doing workon (#22)
• More consistent usage of 'work item' and 'issue' throughout doing (#25)
• doing issue create --assigned_to has been renamed to doing issue create --assignee (#37)
• doing list now lists work items in ascending order of creation (newest at bottom) (ca45c0f)

Added

• doing issue create now has --body and --label options. (#37)
• Warn when workitem used in 'doing create pr' has other active linked PRs (#30)
• Added more examples to documentation

Fixed

• Minimum version specified for Click (#39)