improved OrthoPhoneEPO.initFromOrtho() so that no exception is raised if an empty string is given as a parameter
improved OrthoPhoneEPO.setTheAccentOnTheUltima(),  OrthoPhoneEPO.setTheAccentOnThePenult() : empty nucleus ok
documentation in OrthoPhoneEPO class
overloaded OrthoPhone.endswith() by OrthoPhoneEPO.endswith() so that needed phonetic transformations are taken in account