logical hitting : merge method

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31924 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
logical hitting : axes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31925 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e