make sure Derivative[x^2] = 2x not x*2

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24833 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
make sure Derivative[x^2] = 2x not x*2 [part 2]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24835 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Changing giac.js to the latest version in web/kickstart.xml

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24839 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e