ParticleLayout/Lattice API changes

• Particle Layout::addParticle has unphysical default value -1 [GitHub]
• Lattice2D and Lattice3D should be made as similar as possible [Redmine2492] (related to #617 and #822)
• shape of finite lattice must not be defined in multiples of base vector [Redmine2394]
• Can we do without prefix "FormFactor"?
• ParticleCoreShell: counterintuitive order of arguments [Redmine2506]
• "OutputData" is a misnomer (such data are also read in). Current best proposal: Datafield.
• kvector_t -> R3 [done in 1.20]

Includes Redmine issues 2494, 2506

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mentioned in issue #61 (closed)

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marked this issue as related to #61 (closed)

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marked the checklist item Can we do without prefix "FormFactor"? as completed

marked the checklist item "OutputData" is a misnomer (such data are also read in). Current best proposal: Datafield. as completed

marked the checklist item ParticleCoreShell: counterintuitive order of arguments [Redmine2506] as completed

changed title from API changes to Particle/Lattice API changes

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changed title from Particle/Lattice API changes to ParticleLayout/Lattice API changes

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marked this issue as related to #822