Implement GetCert command in SCEPv2

Note - due to lack of bigint capability in sscep untested with serials >64bit
Switch SCEPv2 cert issue to NICE
Big cleanup patch - remove a lot of obsolete classes and fix Manifest

This patch removes a lot of Workflow classes which are unused at the
current stage, mainly from the old SCEP and SmartCard code.
Debian Packaging for SCEPv2 Client
Fix dependencies on debian packages

Note: The openca-tools package is available at the OpenXPKI
package mirrors. A debianized source is available at github
https://github.com/openxpki/openca-tools/tree/openxpki
Version Bump to 0.11 - includes a useable SCEPv2 server and client
Quickstart Doc for SCEPv2
Quickstart Doc for SCEPv2 - added scep certificate
change to / during server startup
Merge pull request #38 from mbartosch/develop

change to / during server startup
Remove OpenXPKI::Exception from conditions as it is incompatible with new Workflow

The new upstream workflow conditions crash when a condition throws an exception.
This patch replaces them with the correct behaviour (raise condition_error).
Remaining Exceptions are real problems and not evaluation errors and must remain!
Add auto_revoke flag in revocation workflow and improve qatests
New notification system with SMTP and basic RT integration

Rewrite of the notification system, complete redesign of the handler
logic but keeps the interface (mostly) untouched.
Introduces two SMTP deivery handlers to send plain or html enabled mail.
RT was tested against a RT4 demo install, might need some improvement for
real world usage.
Extend SMTP notifier to use inline images, merge both SMTP classes

The former SMTP_HTML is merged into the SMTP, HTML mode can be enabled
using a config flag. If MIME::Lite is missing, the notifier degrades
silently to plain text mode.
.travis.yml: run apt-get update