Changing giac.js to the latest version in web/kickstart.xml

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25163 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
bugfix: Polynomial ^ NumberValue missing

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25164 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] adding abs to CommandDispatcherGiac

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25165 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e