Update testing install docs
bump(raven): 4.2.3
L10n Extract/compile script. Today's lucky number is 21900.
Merge pull request #457 from mstriemer/update-install-do

Update testing install docs
Admins can simulate network for Boku (bug 1006678)
Merge pull request #463 from kumar303/better-sim

Admins can simulate network for Boku (bug 1006678)
Serve Spartacus from webpay on -dev (bug 1001495)
Merge pull request #449 from muffinresearch/connect-to-spartacus

Serve Spartacus from webpay on -dev (bug 1001495)
add SPARTACUS_STATIC to the CSP

close #464
Make a Falsey default correctly (was bug 1006678)
no longer need to force Mexico (was bug 1006678)
errors as JSON if application/json is in Accept (bug 1013440)
Merge pull request #466 from mstriemer/json-error-messages-1013440

Show errors as JSON if application/json is in Accept (bug 1013440)
Prevent checking `in` on `None`
Treat no solitude buyer as no PIN (bug 1015212)
Add seller to generic transaction(Bug 1014792)

- Add paramter to API call for Boku, Reference
- Update tests
    - ensure seller included in calls to start transaction
    - refactor tests to not depend on set_mocks
Merge pull request #465 from JaredKerim-Mozilla/1014792

Add seller to generic transaction in Webpay (Bug 1014792)
Merge pull request #467 from mstriemer/no-solitude-buyer-has-no-pin-1015212

Treat no solitude buyer as no PIN (bug 1015212)
Update purchase tests (bug 1015288)

- Pass in seller when starting purchase
Merge pull request #468 from JaredKerim-Mozilla/1015288

    Update purchase tests (bug 1015288)