Bugfix: Update Point<dim,Number> documentation, fix norm, norm_square
Bugfix: Update Point<dim,Number> documentation, fix norm, norm_square

Both are supposed to return a real valued scalar product. Update
documentation and implementation accordingly.

andreamola/dealii,maieneuro/dealii,JaeryunYim/dealii,ibkim11/dealii,ESeNonFossiIo/dealii,ibkim11/dealii,EGP-CIG-REU/dealii,kalj/dealii,andreamola/dealii,YongYang86/dealii,Arezou-gh/dealii,johntfoster/dealii,ibkim11/dealii,naliboff/dealii,ibkim11/dealii,johntfoster/dealii,andreamola/dealii,pesser/dealii,adamkosik/dealii,johntfoster/dealii,kalj/dealii,jperryhouts/dealii,kalj/dealii,Arezou-gh/dealii,spco/dealii,pesser/dealii,danshapero/dealii,sairajat/dealii,JaeryunYim/dealii,pesser/dealii,maieneuro/dealii,jperryhouts/dealii,nicolacavallini/dealii,maieneuro/dealii,Arezou-gh/dealii,danshapero/dealii,andreamola/dealii,danshapero/dealii,maieneuro/dealii,YongYang86/dealii,shakirbsm/dealii,jperryhouts/dealii,shakirbsm/dealii,sairajat/dealii,ESeNonFossiIo/dealii,gpitton/dealii,ibkim11/dealii,sairajat/dealii,jperryhouts/dealii,danshapero/dealii,angelrca/dealii,nicolacavallini/dealii,jperryhouts/dealii,spco/dealii,adamkosik/dealii,Arezou-gh/dealii,spco/dealii,JaeryunYim/dealii,naliboff/dealii,Arezou-gh/dealii,maieneuro/dealii,kalj/dealii,spco/dealii,naliboff/dealii,jperryhouts/dealii,adamkosik/dealii,ESeNonFossiIo/dealii,sairajat/dealii,danshapero/dealii,angelrca/dealii,YongYang86/dealii,EGP-CIG-REU/dealii,adamkosik/dealii,johntfoster/dealii,naliboff/dealii,johntfoster/dealii,angelrca/dealii,shakirbsm/dealii,pesser/dealii,johntfoster/dealii,angelrca/dealii,gpitton/dealii,angelrca/dealii,naliboff/dealii,danshapero/dealii,YongYang86/dealii,adamkosik/dealii,JaeryunYim/dealii,pesser/dealii,shakirbsm/dealii,shakirbsm/dealii,ESeNonFossiIo/dealii,adamkosik/dealii,kalj/dealii,gpitton/dealii,pesser/dealii,shakirbsm/dealii,nicolacavallini/dealii,shakirbsm/dealii,EGP-CIG-REU/dealii,sairajat/dealii,maieneuro/dealii,adamkosik/dealii,JaeryunYim/dealii,gpitton/dealii,andreamola/dealii,nicolacavallini/dealii,andreamola/dealii,ESeNonFossiIo/dealii,naliboff/dealii,andreamola/dealii,ESeNonFossiIo/dealii,YongYang86/dealii,nicolacavallini/dealii,angelrca/dealii,nicolacavallini/dealii,angelrca/dealii,maieneuro/dealii,EGP-CIG-REU/dealii,Arezou-gh/dealii,danshapero/dealii,jperryhouts/dealii,JaeryunYim/dealii,kalj/dealii,sairajat/dealii,YongYang86/dealii,sairajat/dealii,YongYang86/dealii,gpitton/dealii,johntfoster/dealii,pesser/dealii,spco/dealii,Arezou-gh/dealii,ibkim11/dealii,EGP-CIG-REU/dealii,spco/dealii,EGP-CIG-REU/dealii,naliboff/dealii,gpitton/dealii,ESeNonFossiIo/dealii,spco/dealii,EGP-CIG-REU/dealii,ibkim11/dealii,gpitton/dealii,nicolacavallini/dealii,JaeryunYim/dealii,kalj/dealii