[Insight-developers] Some miscellaneous changes and check-ins

[Will Schroeder]

Hi Folks-

I've added the Initialize() method to Mesh and PointSet. I also added it to 
IndexedContainerInterface, VectorContainer, and MapContainer (to be 
consistent with the DataObjects). The MeshTest was modified to test the 
Initialize() method. The release data functionality may be, or is at least 
closer to working, for the mesh filters. When I get back home from my 
travels I will confirm this.

I also checked in a bunch of style-related changes that were done the last 
time Jim, Bill, and I did the code review in the Algorithms/ directory.

Will