[Espressomd-maintainer] [espresso] New feature: hat interaction (#43)

[Georg Rempfer]

Just a new potential frequently used in DPD simulations.

You can merge this Pull Request by running:

  git pull https://github.com/rempferg/espresso interaction_hat

Or you can view, comment on it, or merge it online at:

  https://github.com/espressomd/espresso/pull/43

-- Commit Summary --

* Merge remote branch 'upstream/master'
* Added new interaction 'hat' which resembles a force ramp with a given maximum 
and distance over which it decreases to zero. This is the standard conservative 
potential used when applying DPD for hydrodynamics.
* Added documentation for the hat interaction.

-- File Changes --

M doc/ug/inter.tex (33)
M src/Makefile.am (2)
M src/energy.h (6)
M src/features.def (1)
M src/forces.h (5)
A src/hat.c (46)
A src/hat.h (89)
M src/interaction_data.c (11)
M src/interaction_data.h (8)
A src/tcl/hat_tcl.c (77)
A src/tcl/hat_tcl.h (41)
M src/tcl/interaction_data_tcl.c (11)

-- Patch Links --

  https://github.com/espressomd/espresso/pull/43.patch
  https://github.com/espressomd/espresso/pull/43.diff

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https://github.com/espressomd/espresso/pull/43