#39

Issue:2
Center Calculation changed to 
Vector3D center = new Vector3D(min.x+ (max.x-min.x)/2, min.y+(max.y-min.y)/2, min.z+(max.z- min.z)/2);
#39

Issue:4

1. The tube face, width and color is set to 6,1 and Gray.
2. For tube width the value is multiplied by a coefficient =0.01
3. The request render is being called for each property change. 

Issue 11.
On Viewer Resize the model gets vanished.
#39

Issue:8 & 9

1. Selection Mode and Only Selected Property added.
2. isSelected field added to tube

Mouse Pressed doesn't deselect all tubes now.
#39

Issue 5:
Fixed
#39

Issue 10:
BrainDataModifier viewer added.
#42

Code for Perspectives Java is updated
#42

BrainDemo Desktop Perspectives library updated
#42

UserStudy Desktop Perspectives library updated
.