[giac] fix diff(surd(x,3),x), small improvement for beta incomplete, fix series of polynomial

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24782 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Trying to use zip -9 for better compression


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24783 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@24784 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e