Updated references to ZENHOME for systems that have no Zenoss installed.
Updated location of krb5 file. Updated to send KRB5_CONFIG env to kinit.
Handling of missing dcip or realm information.
Handling of domain file updates.
Log information when KRB IP is not set.
Merge pull request #23 from zenoss/feature/setenv

Conflicts:
	txwinrm/util.py