fix worker image build

* fixed the too long for integer substring function (dirty fix)

upgrade raven

hotfix for #890

OSMaxx release v3.11.0 v3.11.0

- #780 login and email confirmation now return you to the original page
- #771 plain text emails no longer contain HTML encoding
- #852 upgraded third party libs
- various refactorings: #855 (part of #845), #850, #856

fix AttributeErrors introduced by 4ec711de70214ace854ac00e6f2613ebb894dcf2

- #820 own exports (if any) can now be accessed without confirmed email address on file
- #815 fixed formatting & grammar of notification email sent when all exports have failed
- #833 upgraded third party libs
- various refactorings: #832 (part of #819), #835, #831, #838, #841

Release v3.8.0

- #758 examples for all export formats
- #755 display time zones where we show times
- Fix #829: GIS export of Haiti failing

Release v3.7.3

- HTTPS URLs in social media metadata when HTTPS is provided by nginx proxy

absolute URLs in social media metadata

add description metatag

Release v3.7.0

User-visible changes:
- #808 improved notification email for processed (succeeded or failed)
  exports
- #750 metadata for Twitter and OpenGraph (Facebook)
  Mentioning the OSMaxx page should now result in a "preview".
- #792 hardcoded processing time heads-up

Potential bugfixes:
- #806 use a cut-out PBF as input for the splitter (mkgmap/Garmin)
- #775 remove "access denied" page with the "request access" button

Refactorings and maintenance:
- #781 use Python-3-style `super()` calls
- #812 started tracking `*.mo` files (compiled translations)

* added pbf for download
* made sure more output is being sent when garmin fails

* Added routing support for garmin
* removed superfluous languages

work around RQ issue

fix bug introduced by 384c56238869b681326ed5fd1d02af32820db1ce

fix for mutliple redis queues not being processed in the harvester

Release 3.4.0

    update Django to 1.10 #790
    improve admin interface #778
    disallow usage to users without valid(ated) email address #779