Generalize define_AA_particles_in_sequence

[pm-blanco]

Currently define_AA_particles_in_sequence is highly specific for proteins and peptides. We could generalize this function so:

• It takes a list of particle names
• It takes a dictionary with the parameters to define such particles
• A prototype of how it could look like:

# Just an example of a possible setup
kT = pmb.Quantity(1, "reduced_energy")
particle_names=["A","B"]
particle_parameters={"sigma": {"A": 0.2*pmb.units.nm,
                                                        "B": 0.3*pmb.units.nm}
                                        "epsilon:{"A": kT,
                                                        "B": kT}
                                                   "q":{"A": 0,
                                                        "B": 1}

def define_list_of_particle(particle_names, particle_parameters):
          for particle_name in particle_names:
                 parameter_values={}
                 for parameter_name in particle_parameters.keys():
                      if particle_name in particle_parameters[particle_name]:
                          parameter_values[particle_name]=particle_parameters[particle_name]
                      else:
                         parameter_values[particle_name]=None
                 self.define_particle(**parameter_values)

[pm-blanco]

solved in #63