[giac] Speedup normal for expressions like 2^(1/1017)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27884 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@27885 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] bug fix for solve

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27886 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@27887 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e