GEP 18 
 * more reduction of fields
 * mapping to gedcom fields
 * style shorteralg as numbers in code


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/geps/gep-018-evidence-style@22466 4ae1f11a-8b86-4847-b8af-ab372f36d1fd