Insonsistent data naming scheme across modules

[MakisH]

Stemming from #197 (comment). Check the adapter documentation.

Currently expected name prefixes:

• CHT
  • Temperature
  • Heat-Flux (snake-case)
  • Sink-Temperature
  • Heat-Transfer-Coefficient
• FSI
  • Force
  • Stress
  • Displacement
  • DisplacementDelta (CamelCase)
• FF (currently not documented 🙈)
  • Pressure
  • PressureGradient (CamelCase)
  • Velocity
  • VelocityGradient

This would be a breaking change (we would need to update the tutorials), so I would suggest that we choose one system and support both styles until v2.

In the contributing guidelines of preCICE we have already chosen the snake-case format. This would also be consistent with our precice-config.xml.

@davidscn what do you think?

[davidscn]

In the contributing guidelines of preCICE we have already chosen the snake-case format. This would also be consistent with our precice-config.xml.

Sounds good 👍