Create BubbleChamberShell.gdml

To define the Al Bubble Chamber Shell or Vessel combine with CuPorts and BubbleComponent files for complete geometry of bubble chamber.
Create CuPortVolume.gdml

To define the Cu in ports in the Bubble Chamber
Create BubbleChamberComponents.gdml

To define the components on the Al Bubble Chamber Shell or Vessel
Create BubbleChamberMother.gdml

File to compile the different daughter geometries for bubble chamber. All child files have been created with the correct positions in each file so that the child files could be combined and this file is no longer needed.
Merge pull request #3 from dgetts/BubbleEx-gdml-file-additions

Bubble ex gdml file additions