0.4.4: Merge pull request #20 from TimBellerby/pm0_4

Bug fix - problem with configuration

PM Version 0.4 Revision 3

Minor changes including some improvements to generated Fortran/MPI code.

PM Version 0.4 Revision 2

Another set of bug fixes - array slices, indexed values and distributions

PM Version 0.4 Revision 1

Multiple bug fixes - mainly empty arrays and array slicing

PM Version 0.4 Revision 0

This is a substantial change from PM 0.3 with significantly changed syntax and enhanced parallel semantics.

The PM language is not yet deemed to be frozen - either in syntax or semantics