A separate ESYS-Particle xml element is needed

[llaniewski]

Problem

Because of my lazy naming, we ended up with a <RemoteForceInterface> element which both runs the Remote Force Interface (RFI) and executes (or connects to) ESYS-Particle code. This naming doesn't make sens and has to be changed.

Proposed solution

Separate elements should be available. The <RemoteForceInterface integrator="..."> should run RFI and connect to a selected integrator. A separate <ESYSParticle> element should run the ESYS-Particle code, and there should be different elements for other DEM codes (LAMMPS in near future).

Comments

This change is not backwards compatible. Old xml files involving RemoteForceInterface would have to be changed.

[mdzik]

Might be we should use xml namespace?

<DEM:ESYSParticle ...>
<DEM:LAMMPS ...>

as a rule for "similar" nodes to make it clearer
it looks like pugi could handle that, (nodename will contain ":" imho)

[llaniewski]

Code modified by #225
Documentation in due time CFD-GO/TCLB_docs#11