Make app settings available to chapman tasks as g.settings

Signed-off-by: Rick Copeland <rick@synapp.io>
Make chapmand run inside a web request context

Signed-off-by: Rick Copeland <rick@synapp.io>
Simplify invoking /__chapman__ request

Signed-off-by: Rick Copeland <rick@synapp.io>
Ensure that individual chapmand worker threads run in their own wsgi request context

Signed-off-by: Rick Copeland <rick@synapp.io>
Remove the abomination that is chapmans, update chapman to work within the request context of a pyramid application

Signed-off-by: Rick Copeland <rick@synapp.io>