Law2_ScGeom_CapillaryPhys_Capillarity maintenance: updates in doc and examples README, in independence of the wiki
Aiming to drop the wiki in #283, I modify here the doc of Law2_ScGeom_CapillaryPhys_Capillarity to point to yade-data instead of https://yade-dem.org/wiki/CapillaryTriaxialTest. Plus some cleaning / clarification when passing by.