some general cleanup, starting with revocation
Merge branch 'master' of ssh://git@github.com/Kalliope/minica.git
revoke listener
added CRL and CRLEntry class, fixing showCert
Merge branch 'master' of ssh://git@github.com/Kalliope/minica.git

Conflicts:
	org.jcryptool.visual.jctca/src/org/jcryptool/visual/jctca/Util.java
	org.jcryptool.visual.jctca/src/org/jcryptool/visual/jctca/listeners/CAListener.java