Update to p4est v1.1

This is not working yet.  The mesh structure has changed in p4est and
this change has not been reflected in bfam yet.
Conform to p4est API changes
Link to shared p4est and sc

This was done because static linking was not working on Mac OS X.
More changes for the new p4est
Don't try to write vtk files to root
Build position independent code
We need `P4EST_CONNECT_FULL` for nodes