Uses globalMeshData::mergePoints to topologically merge mesh points.
Also now require all patches on all processors so cleaned up all code for
handling zero-sized patches.
foamToEnsight:
- add -noPatches option
- had incorrect part# when the internalMesh was not output
- case file is always ascii
foamToEnsightParts:
- fixed field selection bug,
no fields were selected when a single time-step was selected
