Events URI, report SDK default value

This release adds a config option to change the URI that events are sent to (most people should not need to change this), and it also includes the value that is given to toggle in the feature request event.

Bug fixes

• Fix error when no config is specified
• Suppress warning when Twisted python is not available

Fix a bug where extras were not included in manifest

v0.19.1

Bump versions, prepare for release