fix for bug 834593 Dividers on search pages do not match mocks
Bump app-validator (bug 841840)

* Use a warning for CSP problems on web apps
* Fix for *nix distro python builds (weird cdata support)
* Sterner CSP warnings
+ Preserve app type in the error bundle
- Remove legacy markup parser code
disable form submit buttons when form is invalid (bug 840663)
fix our linear gradients
reformat datetime into nice date (bug 838751)
add in app to the refund page (bug 841857)
add in support email, set read only fields, make vat optional (bug 841100 and more)
add a script to generate app categories for Marketplace
fix tests
bug 841856, add an email form filter to target all extension developers.
Merge pull request #600 from canuckistani/bug_841856_add_extension_devs_filter

Bug 841856 add extension devs filter
add the rest of the categories to generate-mkt-cats script
Merge pull request #599 from muffinresearch/fix-dividers-834593

Fix for bug 834593 Dividers on search pages do not match mocks
unused import
fix the back button (thanks, @mattbasta) (bug 842310)
move pyjwt to a package
update api token page (bug 842382)
remove unused import
fix charlimit field position in mobile reviews (bug 842546)
navigation IA updates (bug 839664)