boundaryProcAddressing has been removed. This has not been needed for a
long time. decomposePar has been optimised for mininum IO, rather than
minimum memory usage. decomposePar has also been corrected so that it
can decompose sequences of time-varying meshes.
Currently these deleted function declarations are still in the private section
of the class declarations but will be moved by hand to the public section over
time as this is too complex to automate reliably.