query improvements

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32261 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
* Angle(A,B,A) sometimes undefined (cos a bit more than 1)
* draw 0° and 180°

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@32262 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e