Storage plugin API docs
Storage plugin API docs

Fixes from 599cbd9b
Update instructions for running plugin_runner separately

Change-Id: Id66ced02fec7ef76bee5d5402be1103c4e339170

intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre