#4728 part 2 -- missing files

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37541 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] parsing hyperplan()

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37542 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[cas] support for Distance[(1,2,3), 4x+3y+z=1]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@37543 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e