Add notes to clarify APEL/BDII support
Add notes to clarify APEL/BDII support

Fixes/Closes #393

opensciencegrid/htcondor-ce,brianhlin/htcondor-ce,opensciencegrid/htcondor-ce,matyasselmeci/htcondor-ce,opensciencegrid/htcondor-ce,matyasselmeci/htcondor-ce,brianhlin/htcondor-ce,brianhlin/htcondor-ce,matyasselmeci/htcondor-ce