Editing compiler.mk_r, defines.mk_r, diblock example.
Editing documentation.
editing compile.dox
Allow copying of OrthorhombicBoundary.h, edit docs.
Merge remote branch 'origin/devel' into devel
Proposal in doc/notes about communication.
First commit to buffer branch - Does not yet compile.
Small changes to Exchanger - now compiles.
Work on Atom|Group (un)pack and calls in Exchanger.

Compiles, but still not tested.
Unit tested/debugged new pack|unpack methods.
Removing unused Buffer (un)unpack methods / calls.
Last commit to buffer branch before merge. Small stuff.
Merge remote branch 'origin/devel' into devel
Modifying TODO and development notes.
Changed to doc/notes/ddMd
Editing docs for DdMd Atom, AtomArray, Group.
Adding/editing documentation for some DdMd classes.
Editing docs for GroupStorage subclasses.
Removed DdMd::Simulation::simulate(int) (obsolete).
Removed commented out code (superficial).