[doc] update informations about the official books of OBS
[webui] fix old links to project/monitor pages
[backend] old kiwi seems to behave different when using command line parameters. Restore old behaviour for that case.
[docu] Update from 10.3 to 12.3 (yes: five years later! :-)

Just changing the example to fit with a more current version which is still available.
[webui] make "add a reviewer" work again (including test cases)
[webui] fix adding roles to existant users (fixes #326)
[webui] fixing maintenance workflow test
[backend] fix help information for bs_admin --parse-build-desc
[backend] export proxy variables for worker download via curl
[webui] seperate each partition into an own line in daemon monitor
[webui] also test removing user roles
[webui] don't write files in texts, but only read
[webui] make sure we wait for the users to be saved
[webui] allow old links from factory reminder mails
[api] Get releaseprojects for maintenancerequests
[webui] Show releasetarget for maintenancerequests
- updated testcase
- fixed set incidents for maintenancerequests
- added testcase for setting incidents
[webui] fix xhtml problems on project status
[api] first step to make project status in the webui more reasonable

adding a /webui/project_status route that is taking only the part of the
/status/project route that is interesting for the webui and outputs it
as JSON

To do this I had to refactor quite a big part of code and also optimized
it here and there
[webui] make the project test case as reliable as the package
[backend] bs_srcserver add summing up waiting jobs as well in workerstatus