rather than reimplementing removeKeyFromAgent in deleteKey, just call it ;-)
try to make sure KeyModel can definitivly identify the key in question
Merge branch 'master' of https://github.com/CVL-dev/cvl-ssh-utils
remove some print statements
Revert "Trying to distinguish more clearly between passphrases and passwords,"

This reverts commit 360fd974ac9e2999171acb55119f58617ee37cbf.
Merge pull request #12 from l1ll1/master

definitively identify the Key in KeyModel.

I'm merging this pull request, but we still need to address this issue:

DEBUG:launcher:KeyModel.removeKeyFromAgent: Traceback (most recent call last):
  File "/Users/wettenhj/Desktop/cvl_github/chris2/cvl-fabric-launcher/cvlsshutils/KeyModel.py", line 521, in removeKeyFromAgent
    if self.pubKey in key:
TypeError: 'in <string>' requires string as left operand, not NoneType