Patch by k3daevin: Add Reference class as a friend of sparse matrix to make IBM xlC work.
Patch by k3daevin: Add Reference class as a friend of sparse matrix to make
IBM xlC work.


git-svn-id: 31d9d2f6432a47c86a3640814024c107794ea77c@32787 0785d39b-7218-0410-832d-ea1e28bc413d

lue/dealii,msteigemann/dealii,rrgrove6/dealii,nicolacavallini/dealii,natashasharma/dealii,spco/dealii,ESeNonFossiIo/dealii,flow123d/dealii,adamkosik/dealii,ESeNonFossiIo/dealii,lue/dealii,kalj/dealii,msteigemann/dealii,adamkosik/dealii,sriharisundar/dealii,danshapero/dealii,sairajat/dealii,ibkim11/dealii,natashasharma/dealii,Arezou-gh/dealii,mtezzele/dealii,pesser/dealii,mac-a/dealii,kalj/dealii,ibkim11/dealii,naliboff/dealii,gpitton/dealii,danshapero/dealii,rrgrove6/dealii,sairajat/dealii,pesser/dealii,sairajat/dealii,johntfoster/dealii,naliboff/dealii,lpolster/dealii,YongYang86/dealii,EGP-CIG-REU/dealii,danshapero/dealii,jperryhouts/dealii,angelrca/dealii,ESeNonFossiIo/dealii,rrgrove6/dealii,ibkim11/dealii,spco/dealii,lpolster/dealii,jperryhouts/dealii,andreamola/dealii,kalj/dealii,adamkosik/dealii,JaeryunYim/dealii,johntfoster/dealii,maieneuro/dealii,ESeNonFossiIo/dealii,YongYang86/dealii,Arezou-gh/dealii,angelrca/dealii,spco/dealii,natashasharma/dealii,lue/dealii,sriharisundar/dealii,rrgrove6/dealii,angelrca/dealii,nicolacavallini/dealii,pesser/dealii,flow123d/dealii,sairajat/dealii,maieneuro/dealii,spco/dealii,mtezzele/dealii,Arezou-gh/dealii,JaeryunYim/dealii,JaeryunYim/dealii,jperryhouts/dealii,shakirbsm/dealii,EGP-CIG-REU/dealii,flow123d/dealii,adamkosik/dealii,johntfoster/dealii,maieneuro/dealii,gpitton/dealii,jperryhouts/dealii,naliboff/dealii,nicolacavallini/dealii,sriharisundar/dealii,johntfoster/dealii,ibkim11/dealii,andreamola/dealii,mac-a/dealii,danshapero/dealii,YongYang86/dealii,naliboff/dealii,sriharisundar/dealii,pesser/dealii,mac-a/dealii,sairajat/dealii,mac-a/dealii,gpitton/dealii,spco/dealii,Arezou-gh/dealii,johntfoster/dealii,danshapero/dealii,andreamola/dealii,naliboff/dealii,mtezzele/dealii,sairajat/dealii,johntfoster/dealii,nicolacavallini/dealii,YongYang86/dealii,rrgrove6/dealii,adamkosik/dealii,andreamola/dealii,johntfoster/dealii,lue/dealii,JaeryunYim/dealii,JaeryunYim/dealii,lpolster/dealii,kalj/dealii,nicolacavallini/dealii,YongYang86/dealii,pesser/dealii,pesser/dealii,shakirbsm/dealii,angelrca/dealii,EGP-CIG-REU/dealii,danshapero/dealii,gpitton/dealii,ibkim11/dealii,mtezzele/dealii,flow123d/dealii,EGP-CIG-REU/dealii,msteigemann/dealii,flow123d/dealii,angelrca/dealii,sriharisundar/dealii,jperryhouts/dealii,gpitton/dealii,ESeNonFossiIo/dealii,JaeryunYim/dealii,shakirbsm/dealii,jperryhouts/dealii,pesser/dealii,ibkim11/dealii,kalj/dealii,natashasharma/dealii,shakirbsm/dealii,msteigemann/dealii,maieneuro/dealii,adamkosik/dealii,andreamola/dealii,naliboff/dealii,rrgrove6/dealii,mac-a/dealii,jperryhouts/dealii,natashasharma/dealii,kalj/dealii,msteigemann/dealii,msteigemann/dealii,YongYang86/dealii,Arezou-gh/dealii,ESeNonFossiIo/dealii,ibkim11/dealii,spco/dealii,ESeNonFossiIo/dealii,EGP-CIG-REU/dealii,sairajat/dealii,naliboff/dealii,lue/dealii,shakirbsm/dealii,Arezou-gh/dealii,nicolacavallini/dealii,angelrca/dealii,lpolster/dealii,mac-a/dealii,sriharisundar/dealii,JaeryunYim/dealii,EGP-CIG-REU/dealii,kalj/dealii,YongYang86/dealii,shakirbsm/dealii,lue/dealii,flow123d/dealii,maieneuro/dealii,Arezou-gh/dealii,natashasharma/dealii,mtezzele/dealii,mtezzele/dealii,spco/dealii,EGP-CIG-REU/dealii,shakirbsm/dealii,lue/dealii,flow123d/dealii,angelrca/dealii,adamkosik/dealii,lpolster/dealii,nicolacavallini/dealii,mtezzele/dealii,natashasharma/dealii,rrgrove6/dealii,mac-a/dealii,sriharisundar/dealii,lpolster/dealii,msteigemann/dealii,maieneuro/dealii,gpitton/dealii,gpitton/dealii,maieneuro/dealii,lpolster/dealii,andreamola/dealii,andreamola/dealii,danshapero/dealii