we need inhom coords

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34842 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
PerpendicularBisector[ 3D point, 3D point, direction ]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34846 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
persistent NPE

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34847 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
add tools

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34848 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e