Enhance RegEx Validator to check arrays
Fix bug in metadata activity
Fix incorrect scep reply on repeated enroll request, fixes #126
Add scep subject rendering to sample scep
Change behaviour of set_data_pool expiration

The api was somewhat inconsitent regarding set/update of expiration
date and was missused in several places. This patch equals the behaviour
of initial set and update (using force) in the way, that a missing or undef
value for expiration date sets it to infinity.
The value of 0 is no longer accepted as it had unclear definition.
Adjust datapool calls to changed api
Fix race detaction code in scep server
Fix Mason UI to properly convert datetime info for changed get_cert API
Fix exception in scep san parser
fixed common Makefile top directory reference
Initial work on Enrollment UI
Merge pull request #140 from mrscotty/develop

Initial work on Enrollment UI
added manual authentication activities for enrollment workflow (add/deny)
Add some more logging to SCEP Enrollment
New activity Datapol::DeleteEntry
Add context parameters to PersistCertificateMetadata Activity

Allow definition of parameter mapping from context into the activity and
use it to build metadata information.
Update SCEP Enrollment (Notify / Metadata / Policy Pending / Remove UniqId)
log refactroing

Introdcue new Log facility application
Refactor existing and add additional log statements
New client class OpenXPKI::Client::Simple

Client providing a simple interface for "one shot" tasks
Relax regex for username (allow digit and dot)