Add boxlib to ParaView build

Notes from @danlipsa

To use BoxLib3D in ParaView:

1. BoxLib has to be configured and built with BL_SPACEDIM=3.

2. ParaView has to be configured and built with PARAVIEW_USE_VISITBRIDGE and VISIT_BUILD_READER_Boxlib3D

3. You'll have to match ENABLE_MPI in boxlib with PARAVIEW_USE_MPI. They have to be both on or off.