Implement Soulie capillary model.
Add an example to test different capillary models.
Deprecate getViscoelasticFromSpheresInteraction.

From now all parameter calculations in Viscolastic contact
model will be executed directly in Ip2_ViscElMat_ViscElMat_ViscElPhys.

Using of external function getViscoelasticFromSpheresInteraction is
deprecated now and should be avoided. Minor update of scripts,
which are using it is necessary.
Update examples and test-scripts due to deprecating of getViscoelasticFromSpheresInteraction.
Update Warning about last changes.
Use MatchMaker to set tc, et and en in ViscEl model
Update URL in getViscoelastic