Make copy_nodal/elemental_solution() fail with the same error whether
you are using opt or debug mode.

MeshBase::elem()/node_ptr() assert in debug mode if an element/node is
not found, but return NULL in opt mode.  query_node_ptr() and
query_elem() return NULL in either mode, allowing the user to do his
own NULL checking.

Also fix one whitespace error.
Adding Krol preprint.  The DOI does not seem to be active yet.
Adding Hales, 2013 preprint.
Fixing an error in homemade remove_if algorithms.
Updated Krol 2013.
Added build scripts from Derek
Updated build script with distcc