changed package name from models to verification, moved keystore
connector to verification, added error messages for date validation
error messages
Merge branch 'error_messages'
Revert 93ec188..2716874

This rolls back to commit 93ec188af5d187363340e6553a76ca5c0a647774.
Merge branch 'master' of https://github.com:443/Fingfing/org.jcryptool.visual.crtVerification.git
added error messages, changed package name to verification, moved
keystoreconnector, deleted chain+shell verifier classes