Added the Containment Unit block.  It doesn't work (yet).

+ ModelContainmentUnit - The Containment Unit's model.
+ BlockContainmentUnit - The Block object for the Containment Unit.
+ Blocks - The mod's block reference.
+ containmentUnit.png - The texture for the Containment Unit.
+ TileContainmentUnitRenderer - The TESR (Tile Entity Special Renderer) that handles rendering the Containment Unit's model.
+ TileEntityContainmentUnit - The tile entity that handles (or will handle) the Containment Unit's behavior.
* ClientProxy - Register the TESR for the Containment Unit.
* ModularMachines - Register the Containment Unit and names.
* Reference - Increment version number from 0.0.0.2 to 0.0.0.3.