Add checks to catch empty CSR subject where not expected

Change pkcs10 validator to make empty subject configurable
Add check for empty subject to scep workflow
Initial version of the new WebUI Code
Remove the "recover from failure" feature from SCEP workflow
enroll wf: add check for key policy

This adds a check for the CSR key size, type and hash type. The flags
are set in the ExtractCSR class.

enroll wf: fix location of key check
Extend validation of key type/size and hash in scep enrollment
Fixup qatest stuff
Fix undef warning in WebUI Client
Version Bump to 0.12.0
Fix wrong spelling in MANIFEST (Client::Simple)
Fix i18n Makefile
Add hint on debian file collision to quickstart
Merge remote-tracking branch 'origin/develop' into develop