Long line fix
breaking out the dgx from dgx_quad test
vtk output bug fix
Starting to build out the mesh test with the new data structures
Adding some warnings about lack of plus/minus add (might want to kill these
later)
Moving some glue stuff to bfam_subdomain. Also, adding a comment to issues about
removing fields_m and fields_p once we kill off dgx_quad
Making N an input argument to glue init
Making a generic init function to fill in common things
Refactoring the glue stuff again for simpler (current) implementation. Will need
to change when we get lots of plus glues.
Sort of a big commit, but initializes the glue structures. Essentially the same
as before in dg_quad.
Setting up the add plus / minus fields
Some more work on the new 2d test. Still need to create the communicator
Use MPI_COMM_NULL
Include p8est headers in base
Silence compiler warnings
Add stubs for the p8est managed domain
Add creation of p8est dgx volume subdomains
Add test for p8est dgx

Note that this doesn't test anything explicitly right now but when
compiled in debug mode the communication pattern will be tested.
Implement integer pow function
Use integer pow function